langchain/chains/api/openapi/requests_chain.py/APIRequesterOutputParser/_load_json_block
class APIRequesterOutputParser:    def _load_json_block(self, serialized_block: str) -> str:
        try:
            return json.dumps(json.loads(serialized_block, strict=False))
        except json.JSONDecodeError:
            return "ERROR serializing request."