Fetch and parse the task table information for one or more task IDs.

        Args:
            task_id: A hex string of the task ID to fetch information about. If
                this is None, then the task object table is fetched.

        Returns:
            Information from the task table.

def task_table(self, task_id=None):
        """Fetch and parse the task table information for one or more task IDs.

        Args:
            task_id: A hex string of the task ID to fetch information about. If
                this is None, then the task object table is fetched.

        Returns:
            Information from the task table.
        """
        self._check_connected()
        if task_id is not None:
            task_id = ray.TaskID(hex_to_binary(task_id))
            return self._task_table(task_id)
        else:
            task_table_keys = self._keys(
                ray.gcs_utils.TablePrefix_RAYLET_TASK_string + "*")
            task_ids_binary = [
                key[len(ray.gcs_utils.TablePrefix_RAYLET_TASK_string):]
                for key in task_table_keys
            ]

            results = {}
            for task_id_binary in task_ids_binary:
                results[binary_to_hex(task_id_binary)] = self._task_table(
                    ray.TaskID(task_id_binary))
            return results