OBJECT_LINK_OFFSET.toInt()));
OBJECT_LINK_OFFSET));
  public static ObjectReference getLink(Object ref) {    if (VM.VerifyAssertions) VM._assert(VM.CompileForGCTracing);    if (VM.CompileForGCTracing)      return ObjectReference.fromObject(VM_Magic.getObjectAtOffset(ref,                                                               OBJECT_LINK_OFFSET.toInt()));    else      return ObjectReference.nullReference();  }