PipelineOperation constructor Null safety

1. irte_engine
2. pipeline_operation
3. PipelineOperation
4. PipelineOperation constructor

PipelineOperation class

1. Constructors
2. PipelineOperation
3. Properties
4. hashCode
5. hasListeners
6. initialized
7. isClosed
8. listeners
9. name
10. onDelete
11. onStart
12. runtimeType
13. Methods
14. $configureLifeCycle
15. addListener
16. addListenerId
17. dispose
18. disposeId
19. noSuchMethod
20. notifyChildrens
21. onClose
22. onInit
23. onReady
24. process
25. refresh
26. refreshGroup
27. removeListener
28. removeListenerId
29. toString
30. update
31. Operators
32. operator ==