Function: Returns HTML for the post thumbnail meta box.

Function: Determines whether the post is currently being edited by another user.

Function: Marks the post as currently being edited by the current user.

Function: Outputs the HTML for the notice to say that someone else is editing or has taken over editing of this post.

Function: Creates autosave data for the specified post from `$_POST` data.

Function: Saves a draft or manually autosaves for the purpose of showing a post preview.

Function: Saves a post submitted with XHR.

Function: Returns the list of classes to be used by a meta box.

Function: Returns a sample permalink based on the post name.

Function: Returns post meta data by meta ID.