static Container consoleMainContainer_value;

static Container consoleMainContainer() {
  // parent might have fiddled with console
  Container c = cast callOpt(creator(), 'consoleMainContainer);
  if (c != null) ret c;
  
  if (consoleMainContainer_value != null) ret consoleMainContainer_value;
  JFrame frame = consoleFrame();
  if (frame == null) null;
  ret consoleMainContainer_value = frame.getContentPane();
}

Began life as a copy of #1004954