code: public SDVariable rarg() {
          val args = args();
          if(args == null || args.length != 2)
              throw new ND4JIllegalStateException("In order to use this function, the number of arguments for this function must be 2.");
          return args[1];
      }
docs: The right argument for this function.
  Note that this assumes that there are 2 args for this
  function, if 2 are not set, it throws an
  {@link ND4JIllegalStateException}
  @return