Layout::delete in core/modules/layout/includes/layout.class.inc

Delete this layout.

Layout::getClone in core/modules/layout/includes/layout.class.inc

Clone a layout and return new Layout object.

Layout::__construct in core/modules/layout/includes/layout.class.inc

Constructor for a Layout class.

layout_delete_form in core/modules/layout/layout.admin.inc

Form callback. Delete or revert a layout.

_layout_get_operations in core/modules/layout/layout.admin.inc

Given a layout, return a list of operations that can be performed on it.