code: def authorize_group_permission(
          self, group_name, source_group_name, source_group_owner_id):
          
          d = self.authorize_security_group(
              group_name,
              source_group_name=source_group_name,
              source_group_owner_id=source_group_owner_id)
          return d
docs: This is a convenience function that wraps the "authorize group"
          functionality of the C{authorize_security_group} method.
  
          For an explanation of the parameters, see C{authorize_security_group}.