code: def test_atop_legacy():
      x = da.ones(10, chunks=(5,))
      with pytest.warns(
          UserWarning,
          match="The da.atop function has moved to da.blockwise",
      ):
          y = da.atop(inc, "i", x, "i", dtype=x.dtype)
      z = da.blockwise(inc, "i", x, "i", dtype=x.dtype)
      assert_eq(y, z)
      assert y.name == z.name
  
imports: from __future__ import annotations
  import collections
  from operator import add
  import numpy
  import pytest
  import dask
  import dask.array
  from dask.array.utils import assert_eq
  from dask.blockwise import _BLOCKWISE_DEFAULT_PREFIX, Blockwise, _unique_dep, index_subs, optimize_blockwise, rewrite_blockwise
  from dask.highlevelgraph import HighLevelGraph
  from dask.utils_test import dec, hlg_layer_topological, inc
label_desc: Use image node_id 30 for calling a global function with example usage: test_atop_legacy() without return types