| context | Package context defines the Context type, which carries deadlines, cancellation signals, and other request-scoped values across API boundaries and between processes. |
| errors | Package errors implements functions to manipulate errors. |
| github.com/containerd/log | Package log provides types and functions related to logging, passing loggers through a context, and attaching context to the logger. |
| github.com/docker/docker/pkg/progress | |
| github.com/docker/docker/pkg/streamformatter | Package streamformatter provides helper functions to format a stream. |
| io | Package io provides basic interfaces to I/O primitives. |
| syscall | Package syscall contains an interface to the low-level operating system primitives. |