void keyword_show_in(GtkTreeStore *keyword_tree, GtkTreeIter *iter, gpointer id);
gboolean keyword_is_hidden_in(GtkTreeModel *keyword_tree, GtkTreeIter *iter, gpointer id);
void keyword_show_all_in(GtkTreeStore *keyword_tree, gpointer id);
+void keyword_revert_hidden_in(GtkTreeStore *keyword_tree, gpointer id);
void keyword_hide_unset_in(GtkTreeStore *keyword_tree, gpointer id, GList *keywords);
void keyword_show_set_in(GtkTreeStore *keyword_tree, gpointer id, GList *keywords);