void firePrimitivesAdded(Collection<? extends OsmPrimitive> added, boolean wasIncomplete) {
fireEvent(new PrimitivesAddedEvent(this, added, wasIncomplete));
}
void firePrimitivesRemoved(Collection<? extends OsmPrimitive> removed, boolean wasComplete) {
fireEvent(new PrimitivesRemovedEvent(this, removed, wasComplete));
}