aliases = new TestAliasContext[2];
RelationshipDelta delta;
TestAliasContext aliasContext;
relations[0] = new Relation("A", new String[] {"Foo", "Bar"});
relations[1] = new Relation("B", new String[] {"Bar", "Bar"});
relations[2] = new Relation("C", new String[] {"Bar", "Bazar"});
labels[0] = new AbstractObjectLabel("w", "Bar");
labels[1] = new AbstractObjectLabel("x");
labels[2] = new AbstractObjectLabel("y", "Foo");
labels[3] = new AbstractObjectLabel("z");