phonenumbers.go
func (ipn *IncomingNumberService) Release(ctx context.Context, sid string) error {
	return ipn.client.DeleteResource(ctx, numbersPathPart, sid)
}
func (ipn *IncomingNumberService) Release(ctx context.Context, sid string) error {
	return ipn.client.DeleteResource(ctx, numbersPathPart, sid)
}
func ( ipn * IncomingNumberService ) Release ( ctx context . Context , sid string ) error { return ipn . client . DeleteResource ( ctx , numbersPathPart , sid ) }
// Release removes an IncomingPhoneNumber from your account.
Release removes an IncomingPhoneNumber from your account .