keras/src/trainers/data_adapters/py_dataset_adapter.py/PyDatasetEnqueuer/_get_executor_init
class PyDatasetEnqueuer:    def _get_executor_init(self, workers):
        """Gets the Pool initializer for multiprocessing.

        Args:
            workers: Number of workers.

        Returns:
            Function, a Function to initialize the pool
        """
        raise NotImplementedError