code: def clear_description(self):
          
          if (self.get_description_metadata().is_read_only() or
                  self.get_description_metadata().is_required()):
              raise errors.NoAccess()
          self._my_map['description'] = dict(self._description_default)
docs: Clears the description.
  
          raise:  NoAccess - ``Metadata.isRequired()`` or
                  ``Metadata.isReadOnly()`` is ``true``
          *compliance: mandatory -- This method must be implemented.*