code: public static <T> T getNotNull( T argument,
                                      String name ) {
          isNotNull(argument, name);
          return argument;
      }
docs: Returns the specified argument if it is not <code>null</code>.
  
  @param <T>
  @param argument The argument
  @param name The name of the argument
  @return The argument
  @throws IllegalArgumentException If argument is <code>null</code>