IndexOfTarget
int32 index = m_positionInvoker.IndexOfTarget(handler);
int32 i = IndexOfTarget(h);
int32 IndexOfTarget(const BHandler* h) const;
else if(IndexOfTarget(observer.Target(0)) != -1) {
int32 index = IndexOfTarget(observer.Target(0));
else if(IndexOfTarget(observer.Target(0)) != -1) {
int32 index = IndexOfTarget(observer.Target(0));