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);    }