def save_callables(self, callables_fname):
self._callables_obj.save(callables_fname)<EOL>
r"""
        Save traced modules information to a `JSON <http://www.json.org>`_ file.

        If the file exists it is overwritten

        :param callables_fname: File name
        :type  callables_fname: :ref:`FileName`

        :raises: RuntimeError (Argument \\`callables_fname\\` is not valid)