| 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. |
| go.opentelemetry.io/otel/api/core | |
| go.opentelemetry.io/otel/api/key | |
| go.opentelemetry.io/otel/sdk/export/metric | |
| go.opentelemetry.io/otel/sdk/metric | Package metric provides an implementation of the OpenTelemetry metrics SDK. |
| go.opentelemetry.io/otel/sdk/metric/aggregator/counter | |
| go.opentelemetry.io/otel/sdk/metric/aggregator/gauge | |
| strings | Package strings implements simple functions to manipulate UTF-8 encoded strings. |