Steps forward or backward through a list and outputs the current list item.
The first event to the goForward
port outputs the first item in the list. Each subsequent event outputs the next item.
An event to the goBackward
port goes back to the previous item.
An event to the goToFirst
port resets the node, so that the next event to goForward
will output the first item.
Keywords: choose, count, element, index, item, member, pick, select