code: def get_events(self, callbacks):
          
          d = self.request(
              'GET', path='/v2/events', unbuffered=True,
              # The event_type parameter was added in Marathon 1.3.7. It can be
              # used to specify which event types we are interested in. On older
              # versions of Marathon it is ignored, and we ignore events we're
              # not interested in anyway.
              params={'event_type': sorted(callbacks.keys())},
              headers={
                  'Accept': 'text/event-stream',
                  'Cache-Control': 'no-store'
              })
  
          def handler(event, data):
              callback = callbacks.get(event)
              # Deserialize JSON if a callback is present
              if callback is not None:
                  callback(json.loads(data))
  
          return d.addCallback(
              sse_content, handler, reactor=self._reactor, **self._sse_kwargs)
docs: Attach to Marathon's event stream using Server-Sent Events (SSE).
  
          :param callbacks:
              A dict mapping event types to functions that handle the event data