old_contents: from flotype import serializer
  
  class Client(object):
      def __init__(self, bridge, id):
          self.bridge, self.clientId = bridge, id;
      def getService(self, svc, cb):
          self.bridge._connection.sendCommand(
              'GETOPS', {name: svc,
                         client: this.clientId,
                         callback: serializer.serialize(this._bridge,cb)})
  
new_contents: from flotype import serializer
  
  class Client(object):
      def __init__(self, bridge, id):
          self.bridge, self.clientId = bridge, id;
      def get_service(self, svc):
          return reference.Reference(self, ['client', id, svc])
  
subject: Fix client.py to be consistent with the rest of the library.