svoid test_componentMetaSrc() {
  class B {
    JLabel lbl;
    cachedVisual jline(lbl = jlabel());
  }
  
  new B b;
  var vis = b.visualize();
  assertSameVerbose(b, componentMetaSrc(b.lbl));
  assertSameVerbose(b, componentMetaSrc(vis));
}