def getJsonString(self):
        pageListString = "[{}]".format(self._valueListBuffer.getvalue())
        return '{{"nextPageToken": {},"{}": {}}}'.format(
            json.dumps(self._nextPageToken),
            self._responseClass.getValueListName(), pageListString)
Returns a string version of the SearchResponse that has
dataset/ETHPy150Open ga4gh/server/ga4gh/protocol.py/SearchResponseBuilder.getJsonString