AT

• it should be possible to define plan item listener, which will triggered when a state transition happens:
  • close,
  • complete,
  • create,
  • disable,
  • enable,
  • exit,
  • fault,
  • manualStart,
  • occur,
  • parentResume,
  • parentSuspend,
  • reactivate,
  • reenable,
  • resume,
  • start,
  • suspend,
  • terminate

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• Think about supporting a listener for all events