| encoding/json | Package json implements encoding and decoding of JSON as defined in RFC 7159. |
| github.com/docker/distribution/digest | |
| github.com/docker/docker/image/v1 | |
| github.com/docker/docker/layer | Package layer is package for managing read-only and read-write mounts on the union file system driver. |
| github.com/docker/docker/pkg/ioutils | |
| io/ioutil | Package ioutil implements some I/O utility functions. |
| os | Package os provides a platform-independent interface to operating system functionality. |
| path/filepath | Package filepath implements utility routines for manipulating filename paths in a way compatible with the target operating system-defined file paths. |
| sync | Package sync provides basic synchronization primitives such as mutual exclusion locks. |