old_contents: class Watson:
      """The Watson API adapter class"""
  
      def __init__(self, url, username, password):
          pass
  
new_contents: class Watson:
      """The Watson API adapter class"""
  
      def __init__(self, url, username, password):
          self.url = url
          self.username = username
          self.password = password
  
      def ask_question(self, question_text, question=None):
          """Ask Watson a question via the Question and Answer API
  
          :param question_text: question to ask Watson
          :type question_text: str
          :param question: if question_text is not provided, a Question object
                           representing the question to ask Watson
          :type question: Question
          :return: Answer
          """
          pass
  
subject: Add ask_question stub