code: def test_delegation_specific_cases():
      a = da.from_array(["a", "b", ".", "d"])
      # Fixes GH6631
      assert_eq(a == ".", [False, False, True, False])
      assert_eq("." == a, [False, False, True, False])
      # Fixes GH6611
      assert "b" in a
  
imports: from __future__ import annotations
  import operator
  import numpy
  import pytest
  import dask.array
  from dask.array import Array
  from dask.array.chunk_types import is_valid_array_chunk, is_valid_chunk_type
  from dask.array.utils import assert_eq
label_desc: Use image node_id 9 for calling a global function with example usage: test_delegation_specific_cases() without return types