You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: providers.go
    path of file: ./repos/streamdal/apps/server/vendor/gopkg.in/DataDog/dd-trace-go.v1/internal/hostname
    
    the code of the file until where you have to start completion: // Unless explicitly
    
func Get() string {
	now := time.Now()
	var (
		ch      string
		expired bool
		pv      string
	)
	// if provider is fargate never refresh
	// Otherwise, refresh on expiration or if hostname hasn't been found.
	if ch, pv, expired = getCached(now); pv == fargateName || (!expired && ch != "") {
		return ch
	}
	// Use CAS to avoid spawning more than one go-routine trying to update the cached hostname
	ir := isRefreshing.CompareAndSwap(false, true)
	if ir {
		// TODO: One optimization we could do here is hook into the tracer shutdown signal to gracefully disconnect here
		// For now, we think the added complexity isn't worth it for this single go routine that only runs every 5 minutes.
		go func() {
			updateHostname(now)
		}()
	}
	return ch
}