MathMLActionElement* action_element = TO_ACTION(findMathMLElement(gdome_cast_el(math_view->action_node)));
MathMLActionElement* action_element = TO_ACTION(findMathMLElement(math_view->action_node));
gtk_math_view_action_toggle(GtkMathView* math_view){  g_return_if_fail(math_view != NULL);  g_return_if_fail(math_view->interface != NULL);  g_return_if_fail(math_view->action_node != NULL);#if defined(HAVE_MINIDOM)  MathMLActionElement* action_element = TO_ACTION(findMathMLElement(math_view->action_node));#elif defined(HAVE_GMETADOM)  MathMLActionElement* action_element = TO_ACTION(findMathMLElement(gdome_cast_el(math_view->action_node)));#endif  assert(action_element != NULL);  guint idx = action_element->GetSelectedIndex();  if (idx < action_element->content.GetSize())    idx++;  else    idx = 1;  gtk_math_view_action_set_selected(math_view, idx);}