| 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/containers | |
| github.com/containerd/containerd/oci | |
| github.com/opencontainers/runtime-spec/specs-go | |
| io/ioutil | Package ioutil implements some I/O utility functions. |