| 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/label | |
| go.opentelemetry.io/otel/metric | Package metric provides the OpenTelemetry API used to measure metrics about source code operation. |
| sync | Package sync provides basic synchronization primitives such as mutual exclusion locks. |