rem: _VECTOR_CLASS_NAME::_IteratorIndex(const ConstIterator &iterator) const
add: _VECTOR_CLASS_NAME::_IteratorIndex(const Iterator &iterator) const
context: _VECTOR_CLASS_NAME::_IteratorIndex(const ConstIterator &iterator) const{	if (iterator.Element()) {		int32 index = iterator.Element() - fItems;		if (index >= 0 && index <= fItemCount)			return index;	}	return -1;}