docs: def _writeContainer(self, filelike, specfile, compress):
          """Writes the ``self.container`` entry of the specified specfile to the
          ``fic`` format.
  
          :param filelike: path to a file (str) or a file-like object
          :param specfile: name of an ms-run file present in ``self.info``
          :param compress: bool, True to use zip file compression
  
          .. note::
              In addition it could also dump the ``self.info`` entry to the
              zipfile with the filename ``info``, but this is not used at the
              moment. For details see :func:`maspy.auxiliary.writeJsonZipfile()`
          """
          aux.writeJsonZipfile(filelike, self.container[specfile],
                               compress=compress
                               )