code: def service(cls):
      '''
      Marks the decorated class as a singleton ``service``.
  
      Injects following classmethods:
  
          .. py:method:: .get(context)
  
              Returns a singleton instance of the class for given ``context``
  
              :param context: context to look in
              :type context: :class:`Context`
              :returns: ``cls``
      '''
  
      if not cls:
          return None
  
      # Inject methods
      def get(cls, context):
          return context.get_service(cls)
      cls.get = get.__get__(cls)
  
      log.debug('Registering [%s] (service)', get_fqdn(cls))
  
      return clf service(cls):
      '''
      Marks the decorated class as a singleton ``service``.
  
      Injects following classmethods:
  
          .. py:method:: .get(context)
  
              Returns a singleton instance of the class for given ``context``
  
              :param context: context to look in
              :type context: :class:`Context`
              :returns: ``cls``
      '''
  
      if not cls:
          return None
  
      # Inject methods
      def get(cls, context):
          return context.get_service(cls)
      cls.get = get.__get__(cls)
  
      log.debug('Registering [%s] (service)', get_fqdn(cls))
  
      return cls
docs: Marks the decorated class as a singleton ``service``.
  
      Injects following classmethods:
  
          .. py:method:: .get(context)
  
              Returns a singleton instance of the class for given ``context``
  
              :param context: context to look in
              :type context: :class:`Context`
              :returns: ``cls``