Used to call the registered callback for a plugin screen.

This hook uses a dynamic hook name, $page_hook, which refers to a mixture of plugin
page information including:

1. The page type. If the plugin page is registered as a submenu page, such as for
   Settings, the page type would be ‘settings’. Otherwise the type is ‘toplevel’.
2. A separator of ‘page‘.
3. The plugin basename minus the file extension.

Together, the three parts form the $page_hook. Citing the example above,
the hook name used would be ‘settings_page_pluginbasename’.

do_action( $page_hook );