RunFileSyncEndpointHelper constructor Null safety

1. irte_engine
2. run_file_endpoint_helper
3. RunFileSyncEndpointHelper
4. RunFileSyncEndpointHelper constructor

RunFileSyncEndpointHelper class

1. Constructors
2. RunFileSyncEndpointHelper
3. Properties
4. hashCode
5. runtimeType
6. Methods
7. noSuchMethod
8. toString
9. Operators
10. operator ==
11. Static methods
12. restEndpoint