Non-nullable field '_menuBar' must contain a non-null value when exiting constructor. Consider adding the 'required' modifier or declaring the field as nullable.

Non-nullable field '_title' must contain a non-null value when exiting constructor. Consider adding the 'required' modifier or declaring the field as nullable.

Non-nullable property 'Data' must contain a non-null value when exiting constructor. Consider adding the 'required' modifier or declaring the property as nullable.

Non-nullable field '_host' must contain a non-null value when exiting constructor. Consider adding the 'required' modifier or declaring the field as nullable.

The variable 'toReturn' is assigned but its value is never used

The field 'ContextMenus._useSubMenusSingleFrame' is never used

The field 'ContextMenus._miForceMinimumPosToZero' is never used

The field 'ContextMenus._forceMinimumPosToZero' is assigned but its value is never used

Parameter 'output' is unread.