def get_job(self, job_id: str) -> abstract_job.AbstractJob:
        """Returns an AbstractJob for an existing id.

        Args:
            job_id: Unique ID of the job within the parent program.

        Returns:
            A AbstractJob for this program.
        """
Returns an AbstractJob for an existing id.

        Args:
            job_id: Unique ID of the job within the parent program.

        Returns:
            A AbstractJob for this program.
        
cirq-google/cirq_google/engine/abstract_program.py