mutable.addStrong(key, 1);
}
}
for (Set<NodeKey> sourceKeys : addedWeak.values()) {
for (NodeKey key : sourceKeys) {
mutable.addWeak(key, 1);
}
}
for (Set<NodeKey> sourceKeys : removedStrong.values()) {
for (NodeKey key : sourceKeys) {
mutable.addStrong(key, -1);