mdrost

/**
 * Iterates over elements until pos of one elements decrease
 * or end of iterator is reached. Iterating over iter changes
 * that iterator on caller side.
 * 
 * @param object i    Last output of iter.next() with first element
 * @param object iter Array iterator to next elements
 * 
 * @return array Tuple of current subtree and last iter.next() object
 *               that break the loop.