| context | Package context defines the Context type, which carries deadlines, cancellation signals, and other request-scoped values across API boundaries and between processes. |
| flag | Package flag implements command-line flag parsing. |
| github.com/envoyproxy/go-control-plane/internal/example | |
| github.com/envoyproxy/go-control-plane/pkg/cache/v3 | Package cache defines a configuration cache for the server. |
| github.com/envoyproxy/go-control-plane/pkg/server/v3 | Package server provides an implementation of a streaming xDS server. |
| github.com/envoyproxy/go-control-plane/pkg/test/v3 | Package test contains test utilities |
| os | Package os provides a platform-independent interface to operating system functionality. |