public static IntraTraceBuffer getBuffer(InputTraceNode src, FilterTraceNode dst) {
public static IntraTraceBuffer getBuffer(FilterTraceNode src, OutputTraceNode dst) {
    public static IntraTraceBuffer getBuffer(InputTraceNode src,                                             FilterTraceNode dst) {        if (!bufferStore.containsKey(src)) {            bufferStore.put(src, new IntraTraceBuffer(src, dst));        }        assert (((IntraTraceBuffer) bufferStore.get(src)).getDest() == dst) : "Src connected to different dst in buffer store";        return (IntraTraceBuffer) bufferStore.get(src);    }