def add_labels(self, labels: dict[str, str]) -> AbstractJob:
        """Adds new labels to a previously created quantum job.

        Params:
            labels: New labels to add to the existing job labels.

        Returns:
             This `AbstractJob`.
        """
Adds new labels to a previously created quantum job.

        Params:
            labels: New labels to add to the existing job labels.

        Returns:
             This `AbstractJob`.
        
cirq-google/cirq_google/engine/abstract_job.py