code: def test_rvalue_ref_param():
      r = m.RValueRefParam()
      assert r.func1("123") == 3
      assert r.func2("1234") == 4
      assert r.func3("12345") == 5
      assert r.func4("123456") == 6
  
imports: import sys
  import pytest
  import env
  from pybind11_tests import ConstructorStats
  from pybind11_tests import methods_and_attributes
label_desc: Use image node_id 19 for calling a global function with example usage: test_rvalue_ref_param() without return types