docs: def set_description(self, description):
          """Sets a description.
  
          arg:    description (string): the new description
          raise:  InvalidArgument - ``description`` is invalid
          raise:  NoAccess - ``Metadata.isReadonly()`` is ``true``
          raise:  NullArgument - ``description`` is ``null``
          *compliance: mandatory -- This method must be implemented.*
  
          """
          self._my_map['description'] = self._get_display_text(description, self.get_description_metadata())