| 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. |
| go.opentelemetry.io/otel/api/core | |
| go.opentelemetry.io/otel/api/trace | |
| go.opentelemetry.io/otel/sdk/export | |
| google.golang.org/grpc/codes | Package codes defines the canonical error codes used by gRPC. |
| io | Package io provides basic interfaces to I/O primitives. |
| os | Package os provides a platform-independent interface to operating system functionality. |
| time | Package time provides functionality for measuring and displaying time. |