chore: ensure get() methods have correct type-hintsjlvillal/mypy_ensure_type_hints

Fix classes which don't have correct 'get()' methods for classes
derived from GetMixin.

Add a unit test which verifies that classes have the correct return
type in their 'get()' method.

1 files changed, 6 insertions, 1 deletions

diff --git a/gitlab/v4/objects/environments.py b/gitlab/v4/objects/environments.py
index 6eec069..35f2fb2 100644
--- a/gitlab/v4/objects/environments.py
+++ b/gitlab/v4/objects/environments.py
@@ -1,4 +1,4 @@
-from typing import Any, Dict, Union
+from typing import Any, cast, Dict, Union
 
 import requests
 
@@ -48,3 +48,8 @@ class ProjectEnvironmentManager(
     _from_parent_attrs = {"project_id": "id"}
     _create_attrs = RequiredOptional(required=("name",), optional=("external_url",))
     _update_attrs = RequiredOptional(optional=("name", "external_url"))
+
+    def get(
+        self, id: Union[str, int], lazy: bool = False, **kwargs: Any
+    ) -> ProjectEnvironment:
+        return cast(ProjectEnvironment, super().get(id=id, lazy=lazy, **kwargs))