text: from .sidecar import SidecarSubProcess
  from .sidecar_messages import Message, MessageTypes
  
  class NullEventLogger(object):
  
      def __init__(self, *args, **kwargs):
          pass
  
      def start(self):
          pass
  
      def log(self, payload):
          pass
  
      def terminate(self):
          pass
  
  class EventLogger(NullEventLogger):
  
      def __init__(self, logger_type):
          # type: (str) -> None
          self.sidecar_process = None
          self.logger_type = logger_type
  
      def start(self):
          self.sidecar_process = SidecarSubProcess(self.logger_type)
  
      def log(self, payload):
          msg = Message(MessageTypes.LOG_EVENT, payload)
          self.sidecar_process.msg_handler(msg)
  
      def terminate(self):
          self.sidecar_process.kill()
  