\begin{describe}{gf}{compute-cpl @<class> @> @<list>}
\end{describe}
+\begin{describe}{fun}
+ {report-class-list-merge-error @<class> @<lists> @<error>}
+\end{describe}
+
\begin{describe}{fun}{merge-class-lists @<class> @<lists> @<pick> @> @<list>}
\end{describe}