* Page content (in order of occurrence in the default page.html.twig):
* - node: Fully loaded node, if there is an automatically-loaded node
* associated with the page and the node ID is the second argument in the
* page's path (e.g. node/12345 and node/12345/revisions, but not
* comment/reply/12345).
*
* Regions:
* - page.header: Items for the header region.
* - page.help: Dynamic help text, mostly for admin pages.
* - page.content: The main content of the current page.
* - page.sidebar_first: Items for the first sidebar.
* - page.sidebar_last: Items for the second sidebar.
* - page.footer: Items for the footer region.
*
* @see template_preprocess_page()
* @see html.html.twig
*/
#}
