Set up the enqueue for the CSS files

Calculates the total number of root elements.

Produces a page of nested elements.

Unsets all the children for a given top level element.

Core walker class used to create an HTML list of comments.

Traverses elements to create list from elements.

Ends the element output, if needed.

Ends the list of items after the elements are added.

Starts the element output.

Starts the list before the elements are added.