code: def test_decorator_expression(works_ge_py39, expression):
      works_ge_py39.parse("@%s\ndef x(): pass" % expression)
  
imports: from textwrap import dedent
  import pytest
  from parso import parse
  from parso.python import tree
  from parso.utils import split_lines
label_desc: Use image node_id 20 for calling a global function with example usage: test_decorator_expression(works_ge_py39, expression) without return types