| context | Package context defines the Context type, which carries deadlines, cancellation signals, and other request-scoped values across API boundaries and between processes. |
| encoding/json | Package json implements encoding and decoding of JSON as defined in RFC 7159. |
| fmt | Package fmt implements formatted I/O with functions analogous to C's printf and scanf. |
| github.com/containerd/containerd | |
| github.com/containerd/containerd/content | |
| github.com/containerd/containerd/errdefs | Package errdefs defines the common errors used throughout containerd packages. |
| github.com/containerd/containerd/pkg/cri/util | |
| github.com/containerd/containerd/reference/docker | Package docker is deprecated, and has moved to github.com/distribution/reference. |
| github.com/opencontainers/go-digest | Package digest provides a generalized type to opaquely represent message digests and their operations within the registry. |
| github.com/opencontainers/go-digest/digestset | |
| github.com/opencontainers/image-spec/identity | Package identity provides implementations of subtle calculations pertaining to image and layer identity. |
| github.com/opencontainers/image-spec/specs-go/v1 | |
| sort | Package sort provides primitives for sorting slices and user-defined collections. |
| sync | Package sync provides basic synchronization primitives such as mutual exclusion locks. |