if ((parent.style & SWT.VIRTUAL) != 0) cached = true;
public void setChecked (boolean value) {	checkWidget ();	if ((parent.getStyle () & SWT.CHECK) == 0) return;	if (checked == value) return;	checked = value;	Rectangle bounds = getCheckboxBounds ();	parent.redraw (bounds.x, bounds.y, bounds.width, bounds.height, false);}