class_docstr: A rows-to-rows MapTransformFn.
class_docstr_tok: ["A","rows-to-rows","MapTransformFn","."]
code: def __repr__(self) -> str:
      return f"RowMapTransformFn({self._row_fn})"
  
imports: import itertools
  from abc import abstractmethod
  from enum import Enum
  from typing import Any, Callable, Dict, Iterable, List, Optional, TypeVar, Union
  from ray.data._internal.block_batching.block_batching import batch_blocks
  from ray.data._internal.execution.interfaces.task_context import TaskContext
  from ray.data._internal.output_buffer import BlockOutputBuffer
  from ray.data.block import Block, BlockAccessor, DataBatch
label_desc: Use image node_id 3 for calling the RowMapTransformFn obj's underlying member method code with example usage: obj.__repr__() and returns: str, self, str