code: def test_trivial_matches():
      # a match clause with a wildcard will match anything
      v = relay.Var("v")
      match = relay.Match(v, [relay.Clause(relay.PatternWildcard(), v)])
      assert len(unmatched_cases(match)) == 0
  
      # same with a pattern var
      w = relay.Var("w")
      match = relay.Match(v, [relay.Clause(relay.PatternVar(w), w)])
      assert len(unmatched_cases(match)) == 0
  
file_path: tvm/tests/python/relay/test_pass_unmatched_cases.py
imports: import tvm
  from tvm import te
  from tvm import relay
  from tvm.relay.prelude import Prelude
  from tvm.relay.analysis import unmatched_cases
  import pytest
label_desc: Use image node_id 2 for calling a global function with example usage: test_trivial_matches() without return types