chore: convert to using type-annotations for managers

Convert our manager usage to be done via type annotations.

Now to define a manager to be used in a RESTObject subclass can simply
do:
      class ExampleClass(CRUDMixin, RESTObject):
          my_manager: MyManager

Any type-annotation that annotates it to be of type *Manager (with the
exception of RESTManager) will cause the manager to be created on the
object.

21 files changed, 15 insertions, 242 deletions

diff --git a/gitlab/base.py b/gitlab/base.py
index 361832e..bc96e0f 100644
--- a/gitlab/base.py
+++ b/gitlab/base.py
@@ -49,7 +49,6 @@ class RESTObject(object):
     _parent_attrs: Dict[str, Any]
     _short_print_attr: Optional[str] = None
     _updated_attrs: Dict[str, Any]
-    _managers: Optional[Iterable[Tuple[str, str]]] = None
     manager: "RESTManager"
 
     def __init__(self, manager: "RESTManager", attrs: Dict[str, Any]) -> None:
@@ -151,10 +150,19 @@ class RESTObject(object):
         return hash(self.get_id())
 
     def _create_managers(self) -> None:
-        if self._managers is None:
-            return
-
-        for attr, cls_name in self._managers:
+        # NOTE(jlvillal): We are creating our managers by looking at the class
+        # annotations. If an attribute is annotated as being a *Manager type
+        # then we create the manager and assign it to the attribute.
+        for attr, annotation in sorted(self.__annotations__.items()):
+            if not isinstance(annotation, (type, str)):
+                continue
+            if isinstance(annotation, type):
+                cls_name = annotation.__name__
+            else:
+                cls_name = annotation
+            # All *Manager classes are used except for the base "RESTManager" class
+            if cls_name == "RESTManager" or not cls_name.endswith("Manager"):
+                continue
             cls = getattr(self._module, cls_name)
             manager = cls(self.manager.gitlab, parent=self)
             # Since we have our own __setattr__ method, we can't use setattr()
diff --git a/gitlab/v4/objects/boards.py b/gitlab/v4/objects/boards.py
index ef8d040..8b2959d 100644
--- a/gitlab/v4/objects/boards.py
+++ b/gitlab/v4/objects/boards.py
@@ -27,7 +27,6 @@ class GroupBoardListManager(CRUDMixin, RESTManager):
 
 class GroupBoard(SaveMixin, ObjectDeleteMixin, RESTObject):
     lists: GroupBoardListManager
-    _managers = (("lists", "GroupBoardListManager"),)
 
 
 class GroupBoardManager(CRUDMixin, RESTManager):
@@ -51,7 +50,6 @@ class ProjectBoardListManager(CRUDMixin, RESTManager):
 
 class ProjectBoard(SaveMixin, ObjectDeleteMixin, RESTObject):
     lists: ProjectBoardListManager
-    _managers = (("lists", "ProjectBoardListManager"),)
 
 
 class ProjectBoardManager(CRUDMixin, RESTManager):
diff --git a/gitlab/v4/objects/commits.py b/gitlab/v4/objects/commits.py
index 0ddff9d..05b55b0 100644
--- a/gitlab/v4/objects/commits.py
+++ b/gitlab/v4/objects/commits.py
@@ -21,11 +21,6 @@ class ProjectCommit(RESTObject):
     comments: "ProjectCommitCommentManager"
     discussions: ProjectCommitDiscussionManager
     statuses: "ProjectCommitStatusManager"
-    _managers = (
-        ("comments", "ProjectCommitCommentManager"),
-        ("discussions", "ProjectCommitDiscussionManager"),
-        ("statuses", "ProjectCommitStatusManager"),
-    )
 
     @cli.register_custom_action("ProjectCommit")
     @exc.on_http_error(exc.GitlabGetError)
diff --git a/gitlab/v4/objects/container_registry.py b/gitlab/v4/objects/container_registry.py
index 39f1602..8164e17 100644
--- a/gitlab/v4/objects/container_registry.py
+++ b/gitlab/v4/objects/container_registry.py
@@ -13,7 +13,6 @@ __all__ = [
 
 class ProjectRegistryRepository(ObjectDeleteMixin, RESTObject):
     tags: "ProjectRegistryTagManager"
-    _managers = (("tags", "ProjectRegistryTagManager"),)
 
 
 class ProjectRegistryRepositoryManager(DeleteMixin, ListMixin, RESTManager):
diff --git a/gitlab/v4/objects/deployments.py b/gitlab/v4/objects/deployments.py
index 73f9672..11c60d1 100644
--- a/gitlab/v4/objects/deployments.py
+++ b/gitlab/v4/objects/deployments.py
@@ -11,7 +11,6 @@ __all__ = [
 
 class ProjectDeployment(SaveMixin, RESTObject):
     mergerequests: ProjectDeploymentMergeRequestManager
-    _managers = (("mergerequests", "ProjectDeploymentMergeRequestManager"),)
 
 
 class ProjectDeploymentManager(RetrieveMixin, CreateMixin, UpdateMixin, RESTManager):
diff --git a/gitlab/v4/objects/discussions.py b/gitlab/v4/objects/discussions.py
index 19d1a06..ae7a4d5 100644
--- a/gitlab/v4/objects/discussions.py
+++ b/gitlab/v4/objects/discussions.py
@@ -22,7 +22,6 @@ __all__ = [
 
 class ProjectCommitDiscussion(RESTObject):
     notes: ProjectCommitDiscussionNoteManager
-    _managers = (("notes", "ProjectCommitDiscussionNoteManager"),)
 
 
 class ProjectCommitDiscussionManager(RetrieveMixin, CreateMixin, RESTManager):
@@ -34,7 +33,6 @@ class ProjectCommitDiscussionManager(RetrieveMixin, CreateMixin, RESTManager):
 
 class ProjectIssueDiscussion(RESTObject):
     notes: ProjectIssueDiscussionNoteManager
-    _managers = (("notes", "ProjectIssueDiscussionNoteManager"),)
 
 
 class ProjectIssueDiscussionManager(RetrieveMixin, CreateMixin, RESTManager):
@@ -46,7 +44,6 @@ class ProjectIssueDiscussionManager(RetrieveMixin, CreateMixin, RESTManager):
 
 class ProjectMergeRequestDiscussion(SaveMixin, RESTObject):
     notes: ProjectMergeRequestDiscussionNoteManager
-    _managers = (("notes", "ProjectMergeRequestDiscussionNoteManager"),)
 
 
 class ProjectMergeRequestDiscussionManager(
@@ -63,7 +60,6 @@ class ProjectMergeRequestDiscussionManager(
 
 class ProjectSnippetDiscussion(RESTObject):
     notes: ProjectSnippetDiscussionNoteManager
-    _managers = (("notes", "ProjectSnippetDiscussionNoteManager"),)
 
 
 class ProjectSnippetDiscussionManager(RetrieveMixin, CreateMixin, RESTManager):
diff --git a/gitlab/v4/objects/epics.py b/gitlab/v4/objects/epics.py
index 4ee3611..90dc6ad 100644
--- a/gitlab/v4/objects/epics.py
+++ b/gitlab/v4/objects/epics.py
@@ -26,10 +26,6 @@ class GroupEpic(ObjectDeleteMixin, SaveMixin, RESTObject):
 
     issues: "GroupEpicIssueManager"
     resourcelabelevents: GroupEpicResourceLabelEventManager
-    _managers = (
-        ("issues", "GroupEpicIssueManager"),
-        ("resourcelabelevents", "GroupEpicResourceLabelEventManager"),
-    )
 
 
 class GroupEpicManager(CRUDMixin, RESTManager):
diff --git a/gitlab/v4/objects/groups.py b/gitlab/v4/objects/groups.py
index 67fe91c..7de4f84 100644
--- a/gitlab/v4/objects/groups.py
+++ b/gitlab/v4/objects/groups.py
@@ -71,35 +71,6 @@ class Group(SaveMixin, ObjectDeleteMixin, RESTObject):
     subgroups: "GroupSubgroupManager"
     variables: GroupVariableManager
     wikis: GroupWikiManager
-    _managers = (
-        ("accessrequests", "GroupAccessRequestManager"),
-        ("audit_events", "GroupAuditEventManager"),
-        ("badges", "GroupBadgeManager"),
-        ("billable_members", "GroupBillableMemberManager"),
-        ("boards", "GroupBoardManager"),
-        ("customattributes", "GroupCustomAttributeManager"),
-        ("descendant_groups", "GroupDescendantGroupManager"),
-        ("exports", "GroupExportManager"),
-        ("epics", "GroupEpicManager"),
-        ("hooks", "GroupHookManager"),
-        ("imports", "GroupImportManager"),
-        ("issues", "GroupIssueManager"),
-        ("issues_statistics", "GroupIssuesStatisticsManager"),
-        ("labels", "GroupLabelManager"),
-        ("members", "GroupMemberManager"),
-        ("members_all", "GroupMemberAllManager"),
-        ("mergerequests", "GroupMergeRequestManager"),
-        ("milestones", "GroupMilestoneManager"),
-        ("notificationsettings", "GroupNotificationSettingsManager"),
-        ("packages", "GroupPackageManager"),
-        ("projects", "GroupProjectManager"),
-        ("runners", "GroupRunnerManager"),
-        ("subgroups", "GroupSubgroupManager"),
-        ("variables", "GroupVariableManager"),
-        ("clusters", "GroupClusterManager"),
-        ("deploytokens", "GroupDeployTokenManager"),
-        ("wikis", "GroupWikiManager"),
-    )
 
     @cli.register_custom_action("Group", ("to_project_id",))
     @exc.on_http_error(exc.GitlabTransferProjectError)
diff --git a/gitlab/v4/objects/issues.py b/gitlab/v4/objects/issues.py
index cc1ac3f..9272908 100644
--- a/gitlab/v4/objects/issues.py
+++ b/gitlab/v4/objects/issues.py
@@ -113,15 +113,6 @@ class ProjectIssue(
     resourcelabelevents: ProjectIssueResourceLabelEventManager
     resourcemilestoneevents: ProjectIssueResourceMilestoneEventManager
     resourcestateevents: ProjectIssueResourceStateEventManager
-    _managers = (
-        ("awardemojis", "ProjectIssueAwardEmojiManager"),
-        ("discussions", "ProjectIssueDiscussionManager"),
-        ("links", "ProjectIssueLinkManager"),
-        ("notes", "ProjectIssueNoteManager"),
-        ("resourcelabelevents", "ProjectIssueResourceLabelEventManager"),
-        ("resourcemilestoneevents", "ProjectIssueResourceMilestoneEventManager"),
-        ("resourcestateevents", "ProjectIssueResourceStateEventManager"),
-    )
 
     @cli.register_custom_action("ProjectIssue", ("to_project_id",))
     @exc.on_http_error(exc.GitlabUpdateError)
diff --git a/gitlab/v4/objects/members.py b/gitlab/v4/objects/members.py
index 3812bcb..b2f4c07 100644
--- a/gitlab/v4/objects/members.py
+++ b/gitlab/v4/objects/members.py
@@ -45,7 +45,6 @@ class GroupBillableMember(ObjectDeleteMixin, RESTObject):
     _short_print_attr = "username"
 
     memberships: "GroupBillableMemberMembershipManager"
-    _managers = (("memberships", "GroupBillableMemberMembershipManager"),)
 
 
 class GroupBillableMemberManager(ListMixin, DeleteMixin, RESTManager):
diff --git a/gitlab/v4/objects/merge_requests.py b/gitlab/v4/objects/merge_requests.py
index 63f2786..4def98c 100644
--- a/gitlab/v4/objects/merge_requests.py
+++ b/gitlab/v4/objects/merge_requests.py
@@ -149,18 +149,6 @@ class ProjectMergeRequest(
     resourcelabelevents: ProjectMergeRequestResourceLabelEventManager
     resourcemilestoneevents: ProjectMergeRequestResourceMilestoneEventManager
     resourcestateevents: ProjectMergeRequestResourceStateEventManager
-    _managers = (
-        ("approval_rules", "ProjectMergeRequestApprovalRuleManager"),
-        ("approvals", "ProjectMergeRequestApprovalManager"),
-        ("awardemojis", "ProjectMergeRequestAwardEmojiManager"),
-        ("diffs", "ProjectMergeRequestDiffManager"),
-        ("discussions", "ProjectMergeRequestDiscussionManager"),
-        ("notes", "ProjectMergeRequestNoteManager"),
-        ("pipelines", "ProjectMergeRequestPipelineManager"),
-        ("resourcelabelevents", "ProjectMergeRequestResourceLabelEventManager"),
-        ("resourcemilestoneevents", "ProjectMergeRequestResourceMilestoneEventManager"),
-        ("resourcestateevents", "ProjectMergeRequestResourceStateEventManager"),
-    )
 
     @cli.register_custom_action("ProjectMergeRequest")
     @exc.on_http_error(exc.GitlabMROnBuildSuccessError)
diff --git a/gitlab/v4/objects/notes.py b/gitlab/v4/objects/notes.py
index b8a3215..cbd237e 100644
--- a/gitlab/v4/objects/notes.py
+++ b/gitlab/v4/objects/notes.py
@@ -72,7 +72,6 @@ class ProjectCommitDiscussionNoteManager(
 
 class ProjectIssueNote(SaveMixin, ObjectDeleteMixin, RESTObject):
     awardemojis: ProjectIssueNoteAwardEmojiManager
-    _managers = (("awardemojis", "ProjectIssueNoteAwardEmojiManager"),)
 
 
 class ProjectIssueNoteManager(CRUDMixin, RESTManager):
@@ -106,7 +105,6 @@ class ProjectIssueDiscussionNoteManager(
 
 class ProjectMergeRequestNote(SaveMixin, ObjectDeleteMixin, RESTObject):
     awardemojis: ProjectMergeRequestNoteAwardEmojiManager
-    _managers = (("awardemojis", "ProjectMergeRequestNoteAwardEmojiManager"),)
 
 
 class ProjectMergeRequestNoteManager(CRUDMixin, RESTManager):
@@ -140,7 +138,6 @@ class ProjectMergeRequestDiscussionNoteManager(
 
 class ProjectSnippetNote(SaveMixin, ObjectDeleteMixin, RESTObject):
     awardemojis: ProjectMergeRequestNoteAwardEmojiManager
-    _managers = (("awardemojis", "ProjectMergeRequestNoteAwardEmojiManager"),)
 
 
 class ProjectSnippetNoteManager(CRUDMixin, RESTManager):
diff --git a/gitlab/v4/objects/packages.py b/gitlab/v4/objects/packages.py
index fee043a..d7fe9dc 100644
--- a/gitlab/v4/objects/packages.py
+++ b/gitlab/v4/objects/packages.py
@@ -144,7 +144,6 @@ class GroupPackageManager(ListMixin, RESTManager):
 
 class ProjectPackage(ObjectDeleteMixin, RESTObject):
     package_files: "ProjectPackageFileManager"
-    _managers = (("package_files", "ProjectPackageFileManager"),)
 
 
 class ProjectPackageManager(ListMixin, GetMixin, DeleteMixin, RESTManager):
diff --git a/gitlab/v4/objects/pipelines.py b/gitlab/v4/objects/pipelines.py
index bf41ce1..d604a3a 100644
--- a/gitlab/v4/objects/pipelines.py
+++ b/gitlab/v4/objects/pipelines.py
@@ -78,12 +78,6 @@ class ProjectPipeline(RefreshMixin, ObjectDeleteMixin, RESTObject):
     jobs: "ProjectPipelineJobManager"
     test_report: "ProjectPipelineTestReportManager"
     variables: "ProjectPipelineVariableManager"
-    _managers = (
-        ("bridges", "ProjectPipelineBridgeManager"),
-        ("jobs", "ProjectPipelineJobManager"),
-        ("test_report", "ProjectPipelineTestReportManager"),
-        ("variables", "ProjectPipelineVariableManager"),
-    )
 
     @cli.register_custom_action("ProjectPipeline")
     @exc.on_http_error(exc.GitlabPipelineCancelError)
@@ -204,7 +198,6 @@ class ProjectPipelineScheduleVariableManager(
 
 class ProjectPipelineSchedule(SaveMixin, ObjectDeleteMixin, RESTObject):
     variables: ProjectPipelineScheduleVariableManager
-    _managers = (("variables", "ProjectPipelineScheduleVariableManager"),)
 
     @cli.register_custom_action("ProjectPipelineSchedule")
     @exc.on_http_error(exc.GitlabOwnershipError)
diff --git a/gitlab/v4/objects/projects.py b/gitlab/v4/objects/projects.py
index 71d4564..8392dda 100644
--- a/gitlab/v4/objects/projects.py
+++ b/gitlab/v4/objects/projects.py
@@ -135,7 +135,7 @@ class Project(RefreshMixin, SaveMixin, ObjectDeleteMixin, RepositoryMixin, RESTO
     imports: ProjectImportManager
     issues: ProjectIssueManager
     issues_statistics: ProjectIssuesStatisticsManager
-    issuesstatistics: ProjectIssuesStatisticsManager
+    issuesstatistics: ProjectIssuesStatisticsManager  # Deprecated
     jobs: ProjectJobManager
     keys: ProjectKeyManager
     labels: ProjectLabelManager
@@ -164,61 +164,6 @@ class Project(RefreshMixin, SaveMixin, ObjectDeleteMixin, RepositoryMixin, RESTO
     variables: ProjectVariableManager
     wikis: ProjectWikiManager
 
-    _managers = (
-        ("access_tokens", "ProjectAccessTokenManager"),
-        ("accessrequests", "ProjectAccessRequestManager"),
-        ("additionalstatistics", "ProjectAdditionalStatisticsManager"),
-        ("approvalrules", "ProjectApprovalRuleManager"),
-        ("approvals", "ProjectApprovalManager"),
-        ("audit_events", "ProjectAuditEventManager"),
-        ("badges", "ProjectBadgeManager"),
-        ("boards", "ProjectBoardManager"),
-        ("branches", "ProjectBranchManager"),
-        ("clusters", "ProjectClusterManager"),
-        ("commits", "ProjectCommitManager"),
-        ("customattributes", "ProjectCustomAttributeManager"),
-        ("deployments", "ProjectDeploymentManager"),
-        ("deploytokens", "ProjectDeployTokenManager"),
-        ("environments", "ProjectEnvironmentManager"),
-        ("events", "ProjectEventManager"),
-        ("exports", "ProjectExportManager"),
-        ("files", "ProjectFileManager"),
-        ("forks", "ProjectForkManager"),
-        ("generic_packages", "GenericPackageManager"),
-        ("hooks", "ProjectHookManager"),
-        ("imports", "ProjectImportManager"),
-        ("issues", "ProjectIssueManager"),
-        ("issues_statistics", "ProjectIssuesStatisticsManager"),
-        ("issuesstatistics", "ProjectIssuesStatisticsManager"),  # Deprecated
-        ("jobs", "ProjectJobManager"),
-        ("keys", "ProjectKeyManager"),
-        ("labels", "ProjectLabelManager"),
-        ("members", "ProjectMemberManager"),
-        ("members_all", "ProjectMemberAllManager"),
-        ("mergerequests", "ProjectMergeRequestManager"),
-        ("milestones", "ProjectMilestoneManager"),
-        ("notes", "ProjectNoteManager"),
-        ("notificationsettings", "ProjectNotificationSettingsManager"),
-        ("packages", "ProjectPackageManager"),
-        ("pagesdomains", "ProjectPagesDomainManager"),
-        ("pipelines", "ProjectPipelineManager"),
-        ("pipelineschedules", "ProjectPipelineScheduleManager"),
-        ("protectedbranches", "ProjectProtectedBranchManager"),
-        ("protectedtags", "ProjectProtectedTagManager"),
-        ("pushrules", "ProjectPushRulesManager"),
-        ("releases", "ProjectReleaseManager"),
-        ("remote_mirrors", "ProjectRemoteMirrorManager"),
-        ("repositories", "ProjectRegistryRepositoryManager"),
-        ("runners", "ProjectRunnerManager"),
-        ("services", "ProjectServiceManager"),
-        ("snippets", "ProjectSnippetManager"),
-        ("tags", "ProjectTagManager"),
-        ("triggers", "ProjectTriggerManager"),
-        ("users", "ProjectUserManager"),
-        ("variables", "ProjectVariableManager"),
-        ("wikis", "ProjectWikiManager"),
-    )
-
     @cli.register_custom_action("Project", ("forked_from_id",))
     @exc.on_http_error(exc.GitlabCreateError)
     def create_fork_relation(self, forked_from_id: int, **kwargs: Any) -> None:
diff --git a/gitlab/v4/objects/releases.py b/gitlab/v4/objects/releases.py
index fb7f4f0..2af3248 100644
--- a/gitlab/v4/objects/releases.py
+++ b/gitlab/v4/objects/releases.py
@@ -13,7 +13,6 @@ class ProjectRelease(SaveMixin, RESTObject):
     _id_attr = "tag_name"
 
     links: "ProjectReleaseLinkManager"
-    _managers = (("links", "ProjectReleaseLinkManager"),)
 
 
 class ProjectReleaseManager(CRUDMixin, RESTManager):
diff --git a/gitlab/v4/objects/runners.py b/gitlab/v4/objects/runners.py
index c9e93b8..a32dc84 100644
--- a/gitlab/v4/objects/runners.py
+++ b/gitlab/v4/objects/runners.py
@@ -35,7 +35,6 @@ class RunnerJobManager(ListMixin, RESTManager):
 
 class Runner(SaveMixin, ObjectDeleteMixin, RESTObject):
     jobs: RunnerJobManager
-    _managers = (("jobs", "RunnerJobManager"),)
 
 
 class RunnerManager(CRUDMixin, RESTManager):
diff --git a/gitlab/v4/objects/snippets.py b/gitlab/v4/objects/snippets.py
index 161129d..164b30c 100644
--- a/gitlab/v4/objects/snippets.py
+++ b/gitlab/v4/objects/snippets.py
@@ -81,11 +81,6 @@ class ProjectSnippet(UserAgentDetailMixin, SaveMixin, ObjectDeleteMixin, RESTObj
     awardemojis: ProjectSnippetAwardEmojiManager
     discussions: ProjectSnippetDiscussionManager
     notes: ProjectSnippetNoteManager
-    _managers = (
-        ("awardemojis", "ProjectSnippetAwardEmojiManager"),
-        ("discussions", "ProjectSnippetDiscussionManager"),
-        ("notes", "ProjectSnippetNoteManager"),
-    )
 
     @cli.register_custom_action("ProjectSnippet")
     @exc.on_http_error(exc.GitlabGetError)
diff --git a/gitlab/v4/objects/users.py b/gitlab/v4/objects/users.py
index ad907df..c0f8745 100644
--- a/gitlab/v4/objects/users.py
+++ b/gitlab/v4/objects/users.py
@@ -102,12 +102,6 @@ class CurrentUser(RESTObject):
     gpgkeys: CurrentUserGPGKeyManager
     keys: CurrentUserKeyManager
     status: CurrentUserStatusManager
-    _managers = (
-        ("emails", "CurrentUserEmailManager"),
-        ("gpgkeys", "CurrentUserGPGKeyManager"),
-        ("keys", "CurrentUserKeyManager"),
-        ("status", "CurrentUserStatusManager"),
-    )
 
 
 class CurrentUserManager(GetWithoutIdMixin, RESTManager):
@@ -130,20 +124,6 @@ class User(SaveMixin, ObjectDeleteMixin, RESTObject):
     memberships: "UserMembershipManager"
     projects: "UserProjectManager"
     status: "UserStatusManager"
-    _managers = (
-        ("customattributes", "UserCustomAttributeManager"),
-        ("emails", "UserEmailManager"),
-        ("events", "UserEventManager"),
-        ("followers_users", "UserFollowersManager"),
-        ("following_users", "UserFollowingManager"),
-        ("gpgkeys", "UserGPGKeyManager"),
-        ("identityproviders", "UserIdentityProviderManager"),
-        ("impersonationtokens", "UserImpersonationTokenManager"),
-        ("keys", "UserKeyManager"),
-        ("memberships", "UserMembershipManager"),
-        ("projects", "UserProjectManager"),
-        ("status", "UserStatusManager"),
-    )
 
     @cli.register_custom_action("User")
     @exc.on_http_error(exc.GitlabBlockError)
diff --git a/tests/unit/objects/test_type_hints.py b/tests/unit/objects/test_type_hints.py
deleted file mode 100644
index 6742698..0000000
--- a/tests/unit/objects/test_type_hints.py
+++ /dev/null
@@ -1,74 +0,0 @@
-import inspect
-from typing import Dict
-
-import gitlab
-import gitlab.v4.objects
-
-
-def test_managers_annotated():
-    """Ensure _managers have been type annotated"""
-
-    failed_messages = []
-    for module_name, module_value in inspect.getmembers(gitlab.v4.objects):
-        if not inspect.ismodule(module_value):
-            # We only care about the modules
-            continue
-        # Iterate through all the classes in our module
-        for class_name, class_value in sorted(inspect.getmembers(module_value)):
-            if not inspect.isclass(class_value):
-                continue
-
-            # Ignore imported classes from gitlab.base
-            if class_value.__module__ == "gitlab.base":
-                continue
-
-            # A '_managers' attribute is only on a RESTObject
-            if not issubclass(class_value, gitlab.base.RESTObject):
-                continue
-
-            if class_value._managers is None:
-                continue
-
-            # Collect all of our annotations into a Dict[str, str]
-            annotations: Dict[str, str] = {}
-            for attr, annotation in sorted(class_value.__annotations__.items()):
-                if isinstance(annotation, type):
-                    type_name = annotation.__name__
-                else:
-                    type_name = annotation
-                annotations[attr] = type_name
-
-            for attr, manager_class_name in sorted(class_value._managers):
-                # All of our managers need to end with "Manager" for example
-                # "ProjectManager"
-                if not manager_class_name.endswith("Manager"):
-                    failed_messages.append(
-                        (
-                            f"ERROR: Class: {class_name!r} for '_managers' attribute "
-                            f"{attr!r} The specified manager class "
-                            f"{manager_class_name!r} does not have a name ending in "
-                            f"'Manager'. Manager class names are required to end in "
-                            f"'Manager'"
-                        )
-                    )
-                    continue
-                if attr not in annotations:
-                    failed_messages.append(
-                        (
-                            f"ERROR: Class: {class_name!r}: Type annotation missing "
-                            f"for '_managers' attribute {attr!r}"
-                        )
-                    )
-                    continue
-                if manager_class_name != annotations[attr]:
-                    failed_messages.append(
-                        (
-                            f"ERROR: Class: {class_name!r}: Type annotation mismatch "
-                            f"for '_managers' attribute {attr!r}. Type annotation is "
-                            f"{annotations[attr]!r} while '_managers' is "
-                            f"{manager_class_name!r}"
-                        )
-                    )
-
-    failed_msg = "\n".join(failed_messages)
-    assert not failed_messages, failed_msg
diff --git a/tests/unit/test_base.py b/tests/unit/test_base.py
index 8872dbd..cccdfad 100644
--- a/tests/unit/test_base.py
+++ b/tests/unit/test_base.py
@@ -147,7 +147,7 @@ class TestRESTObject:
 
     def test_create_managers(self, fake_gitlab, fake_manager):
         class ObjectWithManager(FakeObject):
-            _managers = (("fakes", "FakeManager"),)
+            fakes: "FakeManager"
 
         obj = ObjectWithManager(fake_manager, {"foo": "bar"})
         obj.id = 42