code: public static boolean is(Object instance, Object... maybeValues) {
          if (instance != null && maybeValues != null) {
              for (Object mb : maybeValues)
                  if (instance.equals(mb)) return true;
          }
          return false;
      }
docs: Whether the object is one of them.
  
  @param instance    instance
  @param maybeValues
  @return