code: def _order_chunk_index(chunks: List[ChunkType]):
      ndim = chunks[0].ndim
      for i, c in enumerate(chunks):
          if ndim == 2:
              c._index = (i, 0)
          else:
              c._index = (i,)
      return chunks
  
imports: import itertools
  from typing import List, Union
  import numpy
  from ....None import opcodes
  from ....core import get_output_types, recursive_tile
  from ....core.context import get_context, Context
  from ....dataframe.core import DATAFRAME_TYPE
  from ....serialization.serializables import KeyField, Float64Field, ListField, BoolField
  from ....tensor.core import TENSOR_TYPE, TENSOR_CHUNK_TYPE
  from ....tensor import tensor
  from ....typing import TileableType, ChunkType
  from ....utils import has_unknown_shape, ensure_own_data, build_fetch
  from ...operands import LearnOperand, LearnOperandMixin
  from ...utils import convert_to_tensor_or_dataframe, concat_chunks
label_desc: Use image node_id 6 for calling the ToDMatrix obj's underlying member method code with example usage: obj._order_chunk_index(chunks) and returns: chunks