Proper subclassing of ModelManager generic class

Author: nsoranzo

lib/galaxy/managers/hdcas.py

@@ -59,7 +59,7 @@ def set_collection_attributes(dataset_element, *payload):
 
 # TODO: to DatasetCollectionInstanceManager
 class HDCAManager(
-    base.ModelManager,
+    base.ModelManager[model.HistoryDatasetCollectionAssociation],
     secured.AccessibleManagerMixin,
     secured.OwnableManagerMixin,
     deletable.PurgableManagerMixin,

lib/galaxy/managers/tools.py

@@ -30,7 +30,7 @@
     from galaxy.managers.base import OrmFilterParsersType
 
 
-class DynamicToolManager(ModelManager):
+class DynamicToolManager(ModelManager[model.DynamicTool]):
     """Manages dynamic tools stored in Galaxy's database."""
 
     model_class = model.DynamicTool