code: def test_slash_in_identifier():
      x = relay.var("base/x")
      y = relay.var("base/y")
      z = x + y
      txt = astext(z)
      assert "base/x" in txt
      assert "base/y" in txt
  
imports: import tvm
  import tvm.testing
  from tvm import te
  from tvm import relay
  from tvm.relay import testing
  import numpy
  from tvm.relay import Expr
  from tvm.relay.analysis import free_vars
  import pytest
label_desc: Use image node_id 28 for calling a global function with example usage: test_slash_in_identifier() without return types