- * Sometimes, one of the callbacks need to leave information for the next ones. If the simple push/pop mechanism
- * introduced in previous section isn't enough, you can always use this full featured one.
+ * Sometimes, one of the callbacks need to leave information for the next
+ * ones. If the simple push/pop mechanism introduced in previous section
+ * isn't enough, you can always use this full featured one. The bad point is
+ * that it is quite badly documented...
+ *
+ * \htmlonly <!-- DOXYGEN_NAVBAR_LABEL="Full featured Callback State" -->\endhtmlonly
+ *