return (oneInput() && sources[0].getSrc().isFileReader());
OffChipBuffer buffer = IntraTraceBuffer.getBuffer(this, getNextFilter()).getNonRedundant();  if (buffer.getDest() instanceof OutputTraceNode && ((OutputTraceNode) buffer.getDest()).isFileReader()) return true;  return false;
    public boolean onlyFileInput() {        return (oneInput() && sources[0].getSrc().isFileReader());    }