Imports go.opentelemetry.io/otel/trace go.opentelemetry.io/proto/otlp/common/v1 go.opentelemetry.io/proto/otlp/logs/v1 go.uber.org/zap/buffer go.uber.org/zap/zapcore google.golang.org/protobuf/proto Standard library imports encoding/base64 encoding/json strconv sync time