+void psppire_data_editor_goto_variable (PsppireDataEditor *, gint dict_index);
+void psppire_data_editor_data_delete_variables (PsppireDataEditor *de);
+void psppire_data_editor_var_delete_variables (PsppireDataEditor *de);
+void psppire_data_editor_insert_new_case_at_posn (PsppireDataEditor *de, gint posn);
+void psppire_data_editor_insert_new_variable_at_posn (PsppireDataEditor *de, gint posn);