IEnumerator _Display(TutorialConversation conversation)
    {
        for (int i = 0; i < conversation.entries.Length; i++)
        {
            if (conversation.entries[i].author == ConversationParticipant.Professor)
            {
                yield return(StartCoroutine(professor._Say(conversation.entries[i].message)));
            }
        }

        if (onConversationEnd != null)
        {
            onConversationEnd(conversation);
        }
    }
 public void Display(TutorialConversation conversation)
 {
     StopAllCoroutines();
     StartCoroutine(_Display(conversation));
 }