code: public static void unexpectedIfNot(boolean tester, String msg, Object... args) {
          unexpectedIf(!tester, msg, args);
      }
docs: Throws out a {@link UnexpectedException} with message and cause specified when `tester`
  is **not** evaluated to `true`.
  
  @param tester
  when `false` then throw out the exception.
  @param msg
  the error message format pattern.
  @param args
  the error message format arguments.