code: def test_copy(self) -> None:
      c = bcc.RGB(10, 20, 30)
      c2 = c.copy()
      assert c2 is not c
      assert c2.a == c.a
      assert c2.r == c.r
      assert c2.g == c.g
      assert c2.b == c.b
  
imports: from __future__ import annotations
  import pytest
  import bokeh.colors.color
label_desc: Use image node_id 3 for calling the Test_RGB obj's underlying member method code with example usage: obj.test_copy() without return types