Fix type checking

Author: AugustoMagalhaes

src/ert/gui/simulation/combobox_with_description.py

@@ -130,7 +130,7 @@ def addDescriptionItem(
         model.setData(index, description, DESCRIPTION_ROLE)
         model.setData(index, group, GROUP_TITLE_ROLE)
 
-    def sizeHint(self):
+    def sizeHint(self) -> QSize:
         original_size_hint = super().sizeHint()
         new_width = int(original_size_hint.width() + 220)
         new_height = int(super().sizeHint().height() * 1.5)

src/ert/run_models/multiple_data_assimilation.py

@@ -193,5 +193,5 @@ def description(cls) -> str:
         return "[Sample|restart] → [evaluate → update] for each weight"
 
     @classmethod
-    def group(cls) -> None:
+    def group(cls) -> Optional[str]:
         return MULTIPLE_DATA_ASSIMILATION_GROUP

src/ert/run_models/single_test_run.py

@@ -54,5 +54,5 @@ def description(cls) -> str:
         return "Sample parameters → evaluate single realization"
 
     @classmethod
-    def group(cls) -> None:
+    def group(cls) -> Optional[str]:
         return SINGLE_TEST_RUN_GROUP