func (iter *SparseMatIterator) Next() *SparseNode {
	node := C.cvGetNextSparseNode((*C.CvSparseMatIterator)(iter))
	return (*SparseNode)(node)
}
func (iter *SparseMatIterator) Next() *SparseNode {
	node := C.cvGetNextSparseNode((*C.CvSparseMatIterator)(iter))
	return (*SparseNode)(node)
}
func ( iter * SparseMatIterator ) Next ( ) * SparseNode { node := C . cvGetNextSparseNode ( ( * C . CvSparseMatIterator ) ( iter ) ) return ( * SparseNode ) ( node ) }
// returns next sparse array node (or NULL if there is no more nodes)
returns next sparse array node ( or NULL if there is no more nodes )