| 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. |
| fmt | Package fmt implements formatted I/O with functions analogous to C's printf and scanf. |
| 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/errdefs | Package errdefs defines a set of error interfaces that packages should use for communicating classes of errors. |
| github.com/docker/docker/pkg/plugingetter | |
| github.com/docker/docker/pkg/plugins | Package plugins provides structures and helper functions to manage Docker plugins. |
| github.com/docker/docker/volume | |
| github.com/moby/locker | Package locker provides a mechanism for creating finer-grained locking to help free up more global locks to handle other tasks. |
| github.com/pkg/errors | Package errors provides simple error handling primitives. |
| sort | Package sort provides primitives for sorting slices and user-defined collections. |
| strings | Package strings implements simple functions to manipulate UTF-8 encoded strings. |
| sync | Package sync provides basic synchronization primitives such as mutual exclusion locks. |
| time | Package time provides functionality for measuring and displaying time. |