| encoding/hex | Package hex implements hexadecimal encoding and decoding. |
| encoding/json | Package json implements encoding and decoding of JSON as defined in RFC 7159. |
| github.com/containerd/containerd/reference/docker | Package docker is deprecated, and has moved to github.com/distribution/reference. |
| github.com/pkg/errors | Package errors provides simple error handling primitives. |
| math/rand | Package rand implements pseudo-random number generators suitable for tasks such as simulation, but it should not be used for security-sensitive work. |
| strings | Package strings implements simple functions to manipulate UTF-8 encoded strings. |