private void doAddToStack(LinkedList<UndoableGroup> stack, UndoableGroup group, int limit) {
if (!group.isUndoable() && stack.isEmpty()) return;
stack.addLast(group);
while (stack.size() > limit) {
stack.removeFirst();
}
}
private void doAddToStack(LinkedList<UndoableGroup> stack, UndoableGroup group, int limit) {
if (!group.isUndoable() && stack.isEmpty()) return;
stack.addLast(group);
while (stack.size() > limit) {
stack.removeFirst();
}
}