if (Plan.verbose > 0) VM.sysWriteln("Collection triggered due to ");
if (Plan.verbose > 0) VM.sysWriteln("Collection triggered due to ", why);
  public static final void triggerCollection(String why) throws VM_PragmaInterruptible {    // VM_Scheduler.dumpStack();    if (Plan.verbose > 0) VM.sysWriteln("Collection triggered due to ");    long start = System.currentTimeMillis();    VM_CollectorThread.collect(VM_CollectorThread.handshake);  }