old_contents: class CalmService(object):
      def __init__(self, app, url):
          super(CalmService, self).__init__()
  
          self._app = app
          self._url = url
  
      def get(self, *url):
          return self._app.get(self._url, *url)
  
      def post(self, *url):
          return self._app.post(self._url, *url)
  
      def put(self, *url):
          return self._app.put(self._url, *url)
  
      def delete(self, *url):
          return self._app.delete(self._url, *url)
  
new_contents: """
  This module defines a class that implements the notion of a Service.
  
  When the user defines several handlers that share a common URL prefix, Calm
  enables them to define a Service using that common prefix. Afterwards, all
  that handlers can be defines using that prefix, without specifying the
  repeating common prefix, eliminating duplication and irritating bugs.
  """
  
  
  class CalmService(object):
      """
      This class implements the Service notion.
  
      An instance of this class is initialized when `calm.Application.service()`
      is called, with the service prefix. This class simply redefines the HTTP
      method decorators by prepending the Service prefix to the handler URL.
      """
  
      def __init__(self, app, url):
          """
          Initializes a Calm Service.
  
          Arguments:
              app - the calm application the service belongs to
              url - the service prefix
          """
          super(CalmService, self).__init__()
  
          self._app = app
          self._url = url
  
      def get(self, *url):
          """Extends the GET HTTP method decorator."""
          return self._app.get(self._url, *url)
  
      def post(self, *url):
          """Extends the POST HTTP method decorator."""
          return self._app.post(self._url, *url)
  
      def put(self, *url):
          """Extends the PUT HTTP method decorator."""
          return self._app.put(self._url, *url)
  
      def delete(self, *url):
          """Extends the DELETE HTTP method decorator."""
          return self._app.delete(self._url, *url)
  
subject: Add docstrings for `service.py`