def METHOD_NAME(self):
    aluminum = gz.math7.Material(gz.math7.MaterialType.ALUMINUM)
    modified = gz.math7.Material(aluminum)
    self.assertEqual(modified, aluminum)
    modified.set_density(1234.0)
    self.assertNotEqual(modified, aluminum)
    modified = gz.math7.Material(aluminum)
    self.assertEqual(modified, aluminum)
    modified.set_type(gz.math7.MaterialType.PINE)
    self.assertNotEqual(modified, aluminum)