| context | Package context defines the Context type, which carries deadlines, cancellation signals, and other request-scoped values across API boundaries and between processes. |
| fmt | Package fmt implements formatted I/O with functions analogous to C's printf and scanf. |
| github.com/containerd/containerd/api/types | |
| github.com/gogo/protobuf/proto | Package proto converts data structures to and from the wire format of protocol buffers. |
| github.com/gogo/protobuf/sortkeys | |
| github.com/gogo/protobuf/types | Package types contains code for interacting with well-known types. |
| google.golang.org/grpc | Package grpc implements an RPC system called gRPC. |
| io | Package io provides basic interfaces to I/O primitives. |
| math | Package math provides basic constants and mathematical functions. |
| reflect | Package reflect implements run-time reflection, allowing a program to manipulate objects with arbitrary types. |
| strings | Package strings implements simple functions to manipulate UTF-8 encoded strings. |