func (tag spanKindTagName) Set(span opentracing.Span, value SpanKindEnum) {
	span.SetTag(string(tag), value)
}
func (tag spanKindTagName) Set(span opentracing.Span, value SpanKindEnum) {
	span.SetTag(string(tag), value)
}
func ( tag spanKindTagName ) Set ( span opentracing . Span , value SpanKindEnum ) { span . SetTag ( string ( tag ) , value ) }
// Set adds a string tag to the `span`
Set adds a string tag to the span