anchor.diff:    addTodo?: {
       subscribe: (fn: (todo: string) => void) => void;
     };
  -  switchStatus?: {
  +  toggleStatus?: {
       subscribe: (fn: (todoId: string) => void) => void;
     };
     receiveTodos?: {
  
positive.code:   });
  ```
  
  
  == Conclusion
  
  
  
  
  
  
  
  
  
  
  
  
  
negative.code:     });
    });
  
    ports.toggleStatus?.subscribe((todoId) => {
      Meteor.call("todos.toggleStatus", todoId, (err: Error) => {
        if (err) {
          // Maybe we should pass this error to Elm
  