| errors | Package errors implements functions to manipulate errors. |
| fmt | Package fmt implements formatted I/O with functions analogous to C's printf and scanf. |
| go.opentelemetry.io/otel/api/metric | |
| go.opentelemetry.io/otel/label | |
| go.opentelemetry.io/otel/sdk/export/metric | |
| go.opentelemetry.io/otel/sdk/export/metric/aggregation | |
| go.opentelemetry.io/otel/sdk/resource | Package resource provides detecting and representing resources. |
| sync | Package sync provides basic synchronization primitives such as mutual exclusion locks. |
| time | Package time provides functionality for measuring and displaying time. |