### Question:
PartyStoreFactory implements PartyStore { public static PartyStore provider() { return SimplePartyStore.INSTANCE; } PartyStoreFactory(); protected  PartyStoreFactory(PartyStore delegate); static PartyStore provider(); @Override Set<URI> getParties(); @Override PartyStore store(URI party); @Override PartyStore remove(URI party);  }### Answer:
@Test public void provider() { assertThat(PartyStoreFactory.provider()).isSameAs(SimplePartyStore.INSTANCE); }