A part in the navigation for pagination.

is_linkbooleanReturns true if the part is a link. Returns false if not.
titlestringThe page number is associated with the part.
urlstringThe URL of the part. It consists of the current page URL path with the pagination parameter for the current part appended.
  "is_link": true,
  "title": "2",
  "url": "/collections/all-products?preview_theme_id=&page=2"