// specify an id in the subValues so wouldn't need to be guessed).
ArgValue closestAv = null;
int thisArgIndex = thisAv.getArgIndex();
+ if (!containsArg(a))
+ return null;
ArgValues compareAvs = this.getArgValues(a);
int closestNextIndex = Integer.MAX_VALUE;
for (ArgValue av : compareAvs.getArgValueList())