NodeStore implements Collection<Node>, NodeIterable { @Override public boolean contains(final Object o) { checkNonNullNodeObject(o); NodeImpl node = (NodeImpl) o; int id = node.getStoreId(); if (id != NodeStore.NULL_ID) { if (get(id) == node) { return true; } } return false; } NodeStore();  NodeStore(final EdgeStore edgeStore, final GraphLock lock, final GraphViewStore viewStore, final GraphVersion graphVersion); NodeImpl get(final int id); NodeImpl get(final Object id); @Override void clear(); @Override int size(); @Override boolean isEmpty(); @Override NodeStoreIterator iterator(); @Override NodeImpl[] toArray(); @Override T[] toArray(T[] array); @Override Collection<Node> toCollection(); @Override boolean add(final Node n); @Override boolean remove(final Object o); @Override boolean contains(final Object o); boolean containsId(final Object id); @Override boolean containsAll(final Collection<?> c); @Override boolean addAll(final Collection<? extends Node> c); @Override boolean removeAll(final Collection<?> c); @Override boolean retainAll(final Collection<?> c); int deepHashCode(); boolean deepEquals(NodeStore obj); @Override void doBreak();  }
@Test public void testContains() { NodeStore nodeStore = new NodeStore(); NodeImpl node = new NodeImpl("0"); nodeStore.add(node); Assert.assertTrue(nodeStore.contains(node)); Assert.assertFalse(nodeStore.contains(new NodeImpl("0"))); Assert.assertFalse(nodeStore.contains(new NodeImpl("2"))); }