public static boolean attemptObject(Object object, int offset, Object oldValue, Object newValue) {
public static boolean attemptObject(Object object, Offset offset, Object oldValue, Object newValue) {
  public static boolean attemptObject(Object object, int offset, Object oldValue, Object newValue) {    if (VM.VerifyAssertions) VM._assert(VM.NOT_REACHED);  // call site should have been hijacked by magic in compiler    return false;  }