# BackForwardList
The object returned to the backForwardList method.
NOTE
This is an abstract type. Any object of this structure can be used where this type is used.
# Properties
# backList
backList :Array<BackForwardListItem>
The portion of the list preceding the current item.
The items are in the order in which they were originally visited.
# forwardList
forwardList :Array<BackForwardListItem>
The portion of the list following the current item.
The items are in the order in which they were originally visited.