code: def test_time():
      assert not isnumeric("time")
  
imports: from datashader.datashape.predicates import isfixed, _dimensions, isnumeric, isscalar
  from datashader.datashape.coretypes import TypeVar, int32, Categorical
label_desc: Use image node_id 4 for calling a global function with example usage: test_time() without return types