kubernetes/vendor/go.opentelemetry.io/otel/exporters/otlp/otlptrace/internal/tracetransform/span.go

// Spans transforms a slice of OpenTelemetry spans into a slice of OTLP
// ResourceSpans.
func Spans(sdl []tracesdk.ReadOnlySpan) []*tracepb.ResourceSpans { … }

// span transforms a Span into an OTLP span.
func span(sd tracesdk.ReadOnlySpan) *tracepb.Span { … }

// status transform a span code and message into an OTLP span status.
func status(status codes.Code, message string) *tracepb.Status { … }

// links transforms span Links to OTLP span links.
func links(links []tracesdk.Link) []*tracepb.Span_Link { … }

func buildSpanFlags(sc trace.SpanContext) uint32 { … }

// spanEvents transforms span Events to an OTLP span events.
func spanEvents(es []tracesdk.Event) []*tracepb.Span_Event { … }

// spanKind transforms a SpanKind to an OTLP span kind.
func spanKind(kind trace.SpanKind) tracepb.Span_SpanKind { … }