LayoutInterfaceTest::testLayoutMenuItems in core/modules/layout/tests/layout.test

Tests conditions and menu item navigation.

LayoutInterfaceTest::testMenuItemReassignment in core/modules/layout/tests/layout.test

Ensure that reassignment of menu items works when deleting layouts.

layout_get_layout_tempstore in core/modules/layout/layout.module

Get a layout or menu item currently being edited from the tempstore.

layout_menu_item_load_multiple_by_path in core/modules/layout/layout.module

Load an individual Layout menu item based on its path.

layout_page_callback in core/modules/layout/layout.pages.inc

Menu callback; Generic page callback for all Layout-provided pages.

layout_path_load in core/modules/layout/layout.module

Menu loader callback; Convert %layout_path placeholders to loaded objects.

_layout_page_access in core/modules/layout/layout.pages.inc

Access callback; Check access for Layout-provided pages.