code: public static void isNotNull( Object argument,
                                    String name ) {
          if (argument == null) {
              throw new IllegalArgumentException(CommonI18n.argumentMayNotBeNull.text(name));
          }
      }
docs: Check that the specified argument is non-null
  
  @param argument The argument
  @param name The name of the argument
  @throws IllegalArgumentException If argument is null