supporting structures for treegraph interim state

Name Stage Failure
failed
build:jdk8 Build There has been a timeout failure or the job got stuck. Check your timeout limits or try again
No job log
failed
build:jdk10 Build There has been a timeout failure or the job got stuck. Check your timeout limits or try again
No job log
failed
build:jdk9 Build There has been a timeout failure or the job got stuck. Check your timeout limits or try again
No job log