Akismet_REST_API::get_alert() – Get the current alert code and message. Alert codes are used to notify the site owner if there’s a problem, like a connection issue between their site and the Akismet API, invalid requests being sent, etc.
Akismet_REST_API::remote_call_permission_callback() – For calls that Akismet.com makes to the site to clear outdated alert codes, use the API key for authorization.
Akismet_REST_API::set_alert() – Update the current alert code and message by triggering a call to the Akismet server.
twentyfifteen_customize_register() – Add postMessage support for site title and description for the Customizer.
twentynineteen_customize_register() – Add postMessage support for site title and description for the Theme Customizer.
twentyseventeen_customize_register() – Add postMessage support for site title and description for the Theme Customizer.
twentysixteen_customize_register() – Adds postMessage support for site title and description for the Customizer.