introduce SampleBatch

4 jobs for refactor in 3 minutes and 40 seconds (queued for 5 seconds)
Status Job ID Name Coverage
  Build
passed #196957
docker
build_linux_36

00:03:18

passed #196958
docker
build_linux_37

00:03:13

passed #196955
macosx
build_macosx_36

00:03:38

passed #196956
macosx
build_macosx_37

00:03:33