StateNamespaces { public static StateNamespace global() { return new GlobalNamespace(); } private  StateNamespaces(); static StateNamespace global(); static StateNamespace window(Coder<W> windowCoder, W window); static StateNamespace windowAndTrigger(
      Coder<W> windowCoder, W window, int triggerIdx); static StateNamespace fromString(
      String stringKey, Coder<W> windowCoder);  }
@Test public void testFromStringGlobal() { assertStringKeyRoundTrips(intervalCoder, StateNamespaces.global()); }