code: def find_permissions_view_menu(self, view_menu):
          
          return (
              self.get_session.query(self.permissionview_model)
              .filter_by(view_menu_id=view_menu.id)
              .all()
          )
docs: Finds all permissions from ViewMenu, returns list of PermissionView
  
              :param view_menu: ViewMenu object
              :return: list of PermissionView objects