old_contents: from twisted.internet import reactor
  import core.module
  import core.fields
  import core.fields.io
  import core.fields.persistant
  import time
  
  class WaterFlush(core.module.Base):
      update_rate = 10
      pistonActuator = use_module('ActuatorPiston')
      humanPresence = use_module('HumanPresenceSensor')
  
      Flush = fields.proxy.mix('Flush',
      												 'ActuatorPiston', 'Piston', 
      												 'HumanPresenceSensor', 'Presence')
  
new_contents: from twisted.internet import reactor
  import core.module
  import core.fields
  import core.fields.io
  import core.fields.persistant
  import time
  
  class WaterFlush(core.module.Base):
      Flush = fields.proxy.mix('Flush', 
                                  'ActuatorPiston', 'Piston', 
                                  'HumanPresenceSensor', 'Presence')
  
subject: Update WaterFlush.py