public EditContactCommand(ModelView modelView, bool isFriend)
 {
     _modelView = modelView;
     _isFriend  = isFriend;
 }
 public AddEnemyCommand(ModelView modelView)
 {
     _modelView = modelView;
 }
 public AddFriendCommand(ModelView modelView)
 {
     _modelView = modelView;
 }