public bool RemoveChangeListener(ChangeCallback callback, object userData)
{
ChangeListener item = new ChangeListener();
item.SetCallback(callback);
item.SetUserData(userData);
return(this.m_changeListeners.Remove(item));
}
public bool AddChangeListener(ChangeCallback callback, object userData)
{
ChangeListener item = new ChangeListener();
item.SetCallback(callback);
item.SetUserData(userData);
if (this.m_changeListeners.Contains(item))
{
return(false);
}
this.m_changeListeners.Add(item);
return(true);
}