code: public static void invalidConfigurationIf(boolean tester, String msg, Object... args) {
          if (tester) {
              invalidConfiguration(msg, args);
          }
      }
docs: Throws out a {@link ConfigurationException} with message specified if `tester` evaluated to `true`.
  @param tester
  when `true` then throw out the exception
  @param msg
  the error message format pattern.
  @param args
  the error message format arguments.