$status_code
wp_send_json_error()
status_header()
Props johnbillion. See #35666. Fixes #37897. Built from https://develop.svn.wordpress.org/trunk@38478 git-svn-id: http://core.svn.wordpress.org/trunk@38419 1a063a9b-81f0-0310-95a4-ce76da25c4cd
WP_Customize_Nav_Menu_Section