if (verboseJNI) VM.sysWrite("JNI called: GetSuperclass  \n");
if (traceJNI) VM.sysWrite("JNI called: GetSuperclass  \n");
  private static int GetSuperclass(int envJREF, int classJREF) {    if (verboseJNI) VM.sysWrite("JNI called: GetSuperclass  \n");    VM_JNIEnvironment env;    try {      env = VM_Thread.getCurrentThread().getJNIEnv();      Class cls = (Class) env.getJNIRef(classJREF);       Class supercls = cls.getSuperclass();      if (supercls==null)        return 0;      else        return env.pushJNIRef(supercls);    } catch (Throwable unexpected) {      env = VM_Thread.getCurrentThread().getJNIEnv();      env.recordException(unexpected);      return 0;    }  }