public Dockable combine(CombinerSource source, CombinerTarget target) {
if (target instanceof DisplayerTarget) {
return ((DisplayerTarget) target).execute(source);
} else {
DockStation parent = source.getParent();
PlaceholderMap placeholders = source.getPlaceholders();
StackDockStation stack = new StackDockStation(parent.getTheme());
stack.setController(parent.getController());
if (placeholders != null) {
stack.setPlaceholders(placeholders);
}
stack.drop(source.getOld());
stack.drop(source.getNew());
return stack;
}
}
