Revert "Sample doesn't compile on 2.7.7"
Revert "Sample doesn't compile on 2.7.7"

This reverts commit 87fc813476dad47c21281bf60b653804ad433ab0.

spotify/docker-client,rgarbin/docker-client,MarcoLotz/docker-client,bgokden/docker-client,rgrunber/docker-client,spotify/docker-client,bgokden/docker-client,rgrunber/docker-client,MarcoLotz/docker-client,rgarbin/docker-client