code: def aside_view_declaration(self, view_name):
          
          if view_name in self._combined_asides:  # pylint: disable=unsupported-membership-test
              return getattr(self, self._combined_asides[view_name])  # pylint: disable=unsubscriptable-object
          else:
              return None
docs: Find and return a function object if one is an aside_view for the given view_name
  
          Aside methods declare their view provision via @XBlockAside.aside_for(view_name)
          This function finds those declarations for a block.
  
          Arguments:
              view_name (string): the name of the view requested.
  
          Returns:
              either the function or None