@Test public void is_defined_null() { assertFalse(ID.isDefined(null)); }
public static boolean isDefined(ID id) { return id != null && id.isSet(); }
ID implements Serializable { public static boolean isDefined(ID id) { return id != null && id.isSet(); } }
ID implements Serializable { public static boolean isDefined(ID id) { return id != null && id.isSet(); }  }
ID implements Serializable { public static boolean isDefined(ID id) { return id != null && id.isSet(); }  static ID of(int value); @Override String toString(); int get(); boolean isSet(); static boolean isDefined(ID id); Optional<T> ifSet(Function<Integer, T> fn); }
ID implements Serializable { public static boolean isDefined(ID id) { return id != null && id.isSet(); }  static ID of(int value); @Override String toString(); int get(); boolean isSet(); static boolean isDefined(ID id); Optional<T> ifSet(Function<Integer, T> fn); static ID NONE; }