ClientInterceptor returns a TTRPC unary client interceptor that automatically creates a new span for outgoing TTRPC calls, and passes the span context as metadata on the call.

ServerInterceptor returns a TTRPC unary server interceptor that automatically creates a new span for incoming TTRPC calls, and parents the span to the span context received via metadata, if it exists.

WithSampler returns an option function to set the OC sampler used for the auto-created spans.

Option represents an option function that can be used with the OC TTRPC interceptors.