def get_params(self):
        params = []
        params.append(('mlt', 'true'))
        params.append(('mlt.fl', ','.join(self._fields)))

        for optional in self._optional_params:
            if self._optional_params[optional]:
                params.append(('mlt.%s' % optional,
                    self._optional_params[optional]))

        if self.stream_body:
            params.append(('stream.body', self.stream_body))

        return params
Return the list of query params for the mlt query.
dataset/ETHPy150Open truemped/dopplr/dopplr/solr/query/mlt.py/MoreLikeThisQuery.get_params