fromIterator method

BidirectionalIterator<V> fromIterator (V anchor, { bool reversed: false, bool inclusive: true })

Returns an BidirectionalIterator that starts at anchor. By default, the iterator includes the anchor with the first movement; set inclusive to false if you want to exclude the anchor. Set reversed to true to change the direction of of moveNext and movePrevious.

Note: This iterator allows you to walk the entire set. It does not present a subview.

Implementation 

BidirectionalIterator<V> fromIterator(V anchor,
    {bool reversed: false, bool inclusive: true});