code: def _ragged_fill_empty_rows_grad(
      op,
      unused_grad_output_indices,
      output_grad_values,
      unused_grad_empty_row_indicator,
      unused_grad_reverse_index_map,
  ):
      """Gradients for RaggedFillEmptyRows."""
      reverse_index_map = op.outputs[3]
  
      (
          d_values,
          d_default_value,
      ) = gen_ragged_array_ops.ragged_fill_empty_rows_grad(
          reverse_index_map=reverse_index_map,
          grad_values=output_grad_values,
      )
  
      # d_value_rowids, d_values, d_nrows, d_default_value.
      return [None, d_values, None, d_default_value]
  
imports: from typing import Optional
  from typing import Union
  from tensorflow.python.framework import dtypes
  from tensorflow.python.framework import ops
  from tensorflow.python.framework import sparse_tensor
  from tensorflow.python.framework import tensor
  from tensorflow.python.framework import tensor_shape
  from tensorflow.python.framework import tensor_util
  from tensorflow.python.ops import array_ops
  from tensorflow.python.ops import array_ops_stack
  from tensorflow.python.ops import check_ops
  from tensorflow.python.ops import control_flow_ops
  from tensorflow.python.ops import data_flow_ops
  from tensorflow.python.ops import gen_ragged_array_ops
  from tensorflow.python.ops import math_ops
  from tensorflow.python.ops import sort_ops
  from tensorflow.python.ops.ragged import dynamic_ragged_shape
  from tensorflow.python.ops.ragged import ragged_functional_ops
  from tensorflow.python.ops.ragged import ragged_math_ops
  from tensorflow.python.ops.ragged import ragged_tensor
  from tensorflow.python.ops.ragged import ragged_util
  from tensorflow.python.ops.ragged import segment_id_ops
  from tensorflow.python.types import core
  from tensorflow.python.util import dispatch
  from tensorflow.python.util.tf_export import tf_export
label_desc: Use image node_id 17 for calling a global function with example usage: _ragged_fill_empty_rows_grad(op, unused_grad_output_indices, output_grad_values, unused_grad_empty_row_indicator, unused_grad_reverse_index_map) and returns: list