gint psppire_var_view_append_names (PsppireVarView *vv, gint column, GString *string);
gboolean psppire_var_view_get_iter_first (PsppireVarView *vv, GtkTreeIter *iter);
gint psppire_var_view_append_names (PsppireVarView *vv, gint column, GString *string);
gboolean psppire_var_view_get_iter_first (PsppireVarView *vv, GtkTreeIter *iter);