code: function getDescription(conversation) {
      if (conversation.metadata.conversationersationName) {
        return 'The Conversation ' + conversation.metadata.conversationersationName + ' has been deleted';
      } else {
        return 'The Conversation with ' +
          conversation.participants.join(', ').replace(/(.*),(.*)/, '$1 and$2') +
          ' has been deleted';
      }
    }
docs: Return a message body describing the deletion