func (c tracingHeadersCarrier) Set(key, val string) {
	prefixedKey := tracingKeyEncoding.mapAndCache(key)
	c[prefixedKey] = val
}
func (c tracingHeadersCarrier) Set(key, val string) {
	prefixedKey := tracingKeyEncoding.mapAndCache(key)
	c[prefixedKey] = val
}
func ( c tracingHeadersCarrier ) Set ( key , val string ) { prefixedKey := tracingKeyEncoding . mapAndCache ( key ) c [ prefixedKey ] = val }
// Set implements Set() of opentracing.TextMapWriter
Set implements Set () of opentracing . TextMapWriter