code: def test_dont_remove_no_op_slices_for_getter_or_getter_nofancy(
      which, getitem, getter, getter_nofancy
  ):
      # Test that no-op slices are *not* removed when using getter or
      # getter_nofancy. This ensures that `get` calls are always made in all
      # tasks created by `from_array`, even after optimization
  
      # Pytest doesn't make it easy to parameterize over parameterized fixtures
      if which == "getter":
          get = getter
      else:
          get = getter_nofancy
  
      null = slice(0, None)
      opts = [
          (
              (get, "x", null, False, False),
              (get, "x", null, False, False),
          ),
          (
              (getitem, (get, "x", null, False, False), null),
              (get, "x", null, False, False),
          ),
          (
              (getitem, (get, "x", (null, null), False, False), ()),
              (get, "x", (null, null), False, False),
          ),
      ]
      for orig, final in opts:
          _assert_getter_dsk_eq(
              optimize_slices({"a": orig}), {"a": final}
          )
  
imports: from __future__ import annotations
  import pytest
  import numpy
  import dask
  import dask.array
  from dask.array.chunk import getitem
  from dask.array.core import getter
  from dask.array.core import getter_nofancy
  from dask.array.optimization import _is_getter_task, fuse_slice, optimize, optimize_blockwise, optimize_slices
  from dask.array.utils import assert_eq
  from dask.highlevelgraph import HighLevelGraph
  from dask.optimization import SubgraphCallable, fuse
  from dask.utils import SerializableLock
label_desc: Use image node_id 20 for calling a global function with example usage: test_dont_remove_no_op_slices_for_getter_or_getter_nofancy(which, getitem, getter, getter_nofancy) without return types