Page object
Retrieves items for a page and provides metadata about the position of the page in the paginator
The "item number" of the first item on this page
Retrieve the items for this page
The "item number" of the last item on this page
Get next page (if possible)
Checks to see if there‘s a page after this one
Get previous page (if possible)
Checks to see if there‘s a page before this one
[Validate]