class Agent(object):

    def __init__(self, cfg):
        self._data = cfg

    async def process(self, event_fn, logger):
        pass

    def is_valid(self):
        return True

@@ -70,16 +70,102 @@
  = cfg%0A%0A
+    @property%0A    def prefix(self):%0A        return %22%7B0%7D.%22.format(self._data%5B%22name%22%5D)%0A%0A
     asyn

Handle prefix inside agent