public static boolean differentDRAMs(InputTraceNode in)
public static boolean differentDRAMs(OutputTraceNode out)
    public static boolean differentDRAMs(InputTraceNode in)     {	HashSet drams = new HashSet();	for (int i = 0; i < in.getSources().length; i++) {	    if (drams.contains(OffChipBuffer.getBuffer(in.getSources()[i], in).getDRAM()))		return false;	    drams.add(OffChipBuffer.getBuffer(in.getSources()[i], in).getDRAM());	}	return true;    }