Displays a _doing_it_wrong() message for conflicting widget editor scripts.

Displays the browser update nag.

Enables the block templates (editor mode) for themes with theme.json by default.

Enqueues the assets required for the format library within the block editor.

Enqueues the global styles defined via theme.json.

Generates a unique slug for templates.

Finds the sidebar that a given widget belongs to.

Returns the real mime type of an image file.

Extracts meta information about a WebP file: width, height, and type.

Allows PHP’s getimagesize() to be debuggable when necessary.