daemon/graphdriver/register/register_overlay2.go - third_party/github.com/moby/moby - Git at Google

 // +build !exclude_graphdriver_overlay2,linux

 package register

 import (
 	// register the overlay2 graphdriver
 	_ "github.com/docker/docker/daemon/graphdriver/overlay2"
 )
	// +build !exclude_graphdriver_overlay2,linux

	package register

	import (
	// register the overlay2 graphdriver
	_ "github.com/docker/docker/daemon/graphdriver/overlay2"
	)