code: def test_pr3635_diamond_b():
      o = m.MVB()
      assert o.b == 1
  
      assert o.get_b_b() == 1
  
imports: import pytest
  import env
  from pybind11_tests import ConstructorStats
  from pybind11_tests import multiple_inheritance
label_desc: Use image node_id 12 for calling a global function with example usage: test_pr3635_diamond_b() without return types