const go.opentelemetry.io/otel/trace.currentSpanKey

3 uses

	go.opentelemetry.io/otel/trace (current package)
		context.go#L21: const currentSpanKey traceContextKeyType = iota
		context.go#L25: 	return context.WithValue(parent, currentSpanKey, span)
		context.go#L52: 	if span, ok := ctx.Value(currentSpanKey).(Span); ok {

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