+=item C<tab, description, target, %PARAMS>
+
+Creates a tab for C<tabbed>. The description will be used as displayed name.
+The target should be a block or template that can be processed. C<tab> supports
+a C<method> parameter, which can override the process method to apply target.
+C<method => 'raw'> will just include the given text as is. I was too lazy to
+implement C<include> properly.
+
+Also an C<if> attribute is supported, so that tabs can be suppressed based on
+some occasion. In this case the supplied block won't even get processed, and
+the resulting tab will get ignored by C<tabbed>:
+
+ L.tab('Awesome tab wih much info', '_much_info.html', if => SELF.wants_all)
+