Synopsis

CamelMimeMessage *  (*CamelFilterSearchGetMessageFunc)  (gpointer data,
                                                         CamelException *ex);
gint                camel_filter_search_match           (CamelSession *session,
                                                         CamelFilterSearchGetMessageFunc get_message,
                                                         gpointer data,
                                                         CamelMessageInfo *info,
                                                         const gchar *source,
                                                         const gchar *expression,
                                                         CamelException *ex);