code: public static boolean equalsAny(final Object o1, final Object... o2s) {
          if (o2s != null) {
              for (final Object o2 : o2s) {
                  if (o1 == null) {
                      if (o2 == null) {
                          return true;
                      }
                      continue;
                  }
                  // o1 != null
                  if (o1.equals(o2)) {
                      return true;
                  }
              }
          } else {
              return o1 == null;
          }
          return false;
      }
docs: Return true if o1 equals (according to {@link Object#equals(Object)} any of the given objects.
  Also returns true if o1 is null and any of the given objects is null as well!