code: def _maybe_reindex_columns_na_proxy(
      axes: list[Index],
      mgrs_indexers: list[tuple[BlockManager, dict[int, np.ndarray]]],
      needs_copy: bool,
  ) -> list[BlockManager]:
      """
      Reindex along columns so that all of the BlockManagers being concatenated
      have matching columns.
  
      Columns added in this reindexing have dtype=np.void, indicating they
      should be ignored when choosing a column's final dtype.
      """
      new_mgrs = []
  
      for mgr, indexers in mgrs_indexers:
          # For axis=0 (i.e. columns) we use_na_proxy and only_slice, so this
          #  is a cheap reindexing.
          for i, indexer in indexers.items():
              mgr = mgr.reindex_indexer(
                  axes[i],
                  indexers[i],
                  axis=i,
                  copy=False,
                  only_slice=True,  # only relevant for i==0
                  allow_dups=True,
                  use_na_proxy=True,  # only relevant for i==0
              )
          if needs_copy and not indexers:
              mgr = mgr.copy()
  
          new_mgrs.append(mgr)
      return new_mgrs
  
imports: from __future__ import annotations
  from typing import TYPE_CHECKING, cast
  import warnings
  import numpy
  from pandas._libs import NaT, algos, internals, lib
  from pandas._libs.missing import NA
  from pandas.util._decorators import cache_readonly
  from pandas.util._exceptions import find_stack_level
  from pandas.core.dtypes.cast import ensure_dtype_can_hold_na, find_common_type
  from pandas.core.dtypes.common import is_1d_only_ea_dtype, is_scalar, needs_i8_conversion
  from pandas.core.dtypes.concat import concat_compat
  from pandas.core.dtypes.dtypes import ExtensionDtype, SparseDtype
  from pandas.core.dtypes.missing import is_valid_na_for_dtype, isna, isna_all
  from pandas.core.construction import ensure_wrapped_if_datetimelike
  from pandas.core.internals.array_manager import ArrayManager
  from pandas.core.internals.blocks import ensure_block_shape, new_block_2d
  from pandas.core.internals.managers import BlockManager, make_na_array
label_desc: Use image node_id 3 for calling a global function with example usage: _maybe_reindex_columns_na_proxy(axes, mgrs_indexers, needs_copy) and returns: new_mgrs