code: def test_dense():
      assert_equal_ref(m.dense_r())
      assert_equal_ref(m.dense_c())
      assert_equal_ref(m.dense_copy_r(m.dense_r()))
      assert_equal_ref(m.dense_copy_c(m.dense_c()))
      assert_equal_ref(m.dense_copy_r(m.dense_c()))
      assert_equal_ref(m.dense_copy_c(m.dense_r()))
  
imports: import pytest
  from pybind11_tests import ConstructorStats
label_desc: Use image node_id 4 for calling a global function with example usage: test_dense() without return types