-=head2 Callbacks
-
-RT's CSS files are also Mason templates and the main CSS file,
-conveniently called C<main.css>, has a C<Begin> and C<End> callback
-allowing you to inject custom CSS.
-
-To create an End callback, create the callback directory and an
-End file in that directory:
-
- $ mkdir -p local/html/Callbacks/MyRT/NoAuth/css/aileron/main.css
- $ touch local/html/Callbacks/MyRT/NoAuth/css/aileron/main.css/End
-
-You can use any name you want for the C<MyRT> directory and the theme
-directory should correspond with the theme you want to change.
-
-RT will now evaluate the contents of that file after it processes all
-of the C<@import> statements in C<main.css>.
-