if (verboseJNI) VM.sysWrite("JNI called: UnregisterNatives  \n");
if (traceJNI) VM.sysWrite("JNI called: UnregisterNatives  \n");
  private static int UnregisterNatives(int envHandler) {    if (verboseJNI) VM.sysWrite("JNI called: UnregisterNatives  \n");    VM_Scheduler.traceback("JNI ERROR: UnregisterNatives not implemented yet.");    VM.sysExit(200);    return UNREGISTERNATIVES ;   }