private boolean setIntFieldIfChanged(int fieldRelativeOffset,
                                         int newValue) {
      int fieldOffsetInPage = recordOffsetInPage + fieldRelativeOffset;
      int oldValue = (int)INT_HANDLE.getVolatile(pageBuffer, fieldOffsetInPage);
      if (oldValue != newValue) {
        setIntVolatile(pageBuffer, fieldOffsetInPage, newValue);
        return true;
      }
      return false;
    }
private boolean setIntFieldIfChanged(int fieldRelativeOffset,
                                         int newValue)