code: def test_option():
      assert _dimensions("?int") == _dimensions("int")
      assert _dimensions("3 * ?int") == _dimensions("3 * int")
  
imports: from datashader.datashape.predicates import isfixed, _dimensions, isnumeric, isscalar
  from datashader.datashape.coretypes import TypeVar, int32, Categorical
label_desc: Use image node_id 3 for calling a global function with example usage: test_option() without return types