static boolean inHeap(Object oop) throws NativePragma {
   throw Assert.shouldNotReachHere("unimplemented when hosted");
 }
 static void writeBack(Object oop) throws NativePragma {
   throw Assert.shouldNotReachHere("unimplemented when hosted");
 }
 static Object translate(Object oop) throws NativePragma {
   throw Assert.shouldNotReachHere("unimplemented when hosted");
 }