| 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. |
| 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/global | |
| go.opentelemetry.io/otel/sdk/export/metric | |
| go.opentelemetry.io/otel/sdk/export/metric/aggregator | |
| go.opentelemetry.io/otel/sdk/metric/batcher/ungrouped | |
| go.opentelemetry.io/otel/sdk/metric/controller/push | |
| go.opentelemetry.io/otel/sdk/metric/selector/simple | |
| io | Package io provides basic interfaces to I/O primitives. |
| os | Package os provides a platform-independent interface to operating system functionality. |
| strings | Package strings implements simple functions to manipulate UTF-8 encoded strings. |
| time | Package time provides functionality for measuring and displaying time. |