code: def test_create_default(self) -> None:
      o = bcpo.Override(default=10)
      assert o.default_overridden
      assert o.default == 10
  
imports: from __future__ import annotations
  import pytest
  from tests.support.util.api import verify_all
  import bokeh.core.property.override
label_desc: Use image node_id 1 for calling the Test_Override obj's underlying member method code with example usage: obj.test_create_default() without return types