void NotifyLinkHoveredEvent(int startAttr, int endAttr, int linkId) => OnLinkEvent?.Invoke(ELinkEvent.Hovered, startAttr, endAttr, linkId);
void NotifyLinkDroppedEvent(int startAttr) => OnLinkEvent?.Invoke(ELinkEvent.Dropped, startAttr, null, null);
void NotifyLinkDestroyedEvent(int startAttr, int endAttr, int linkId) => OnLinkEvent?.Invoke(ELinkEvent.Destroyed, startAttr, endAttr, linkId);
/// <summary> /// Event Notify /// </summary> void NotifyLinkCreatedEvent(int startAttr, int endAttr) => OnLinkEvent?.Invoke(ELinkEvent.Created, startAttr, endAttr, null);