async def add_labels_async(self, labels: dict[str, str]) -> EngineProgram:
        """Adds new labels to a previously created quantum program.

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

        Returns:
             This EngineProgram.
        """
        self._program = await self.context.client.add_program_labels_async(
            self.project_id, self.program_id, labels
        )
        return self
Adds new labels to a previously created quantum program.

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

        Returns:
             This EngineProgram.
        
cirq-google/cirq_google/engine/engine_program.py