Boolean oldClientClassProperty = myClientClassProperty;
Boolean oldClientClassProperty = getClientClassProperty();
  public void setClientClassProperty(Boolean _clientClassProperty) {    Boolean oldClientClassProperty = myClientClassProperty;    //myClientClassProperty = (Boolean) _nullIfPrototyped(EOAttribute.CLIENT_CLASS_PROPERTY, _clientClassProperty);    myClientClassProperty = _clientClassProperty;    firePropertyChange(EOAttribute.CLIENT_CLASS_PROPERTY, oldClientClassProperty, getClientClassProperty());  }