code: def test_free_vars_tuple():
      t = relay.Var("t")
      fv = free_vars(relay.Tuple([t, t]))
      assert len(fv) == 1
      assert fv[0] == t
      fv = free_vars(relay.TupleGetItem(t, 123))
      assert len(fv) == 1
      assert fv[0] == t
  
file_path: tvm/tests/python/relay/test_pass_vars.py
imports: import tvm
  from tvm import te
  from tvm import relay
  from tvm.relay.analysis import free_vars, free_type_vars, bound_vars, bound_type_vars, all_vars, all_type_vars
label_desc: Use image node_id 3 for calling a global function with example usage: test_free_vars_tuple() without return types