docs: def data_to_string(self, data_element):
          """
          Converts the given data element into a string representation.
  
          :param data_element: object implementing
              :class:`everest.representers.interfaces.IExplicitDataElement`
          :returns: string representation (using the MIME content type
              configured for this representer)
          """
          stream = NativeIO()
          self.data_to_stream(data_element, stream)
          return stream.getvalue()