in protocol.go [114:125]
func ProtocolFromLoadBalancer(protocol string) LoadBalancerProtocol {
switch protocol {
case "tcp":
return LoadBalancerProtocolTCP
case "udp":
return LoadBalancerProtocolUDP
case "tcp-proxy":
return LoadBalancerProtocolTCPProxy
default:
return LoadBalancerProtocolInvalid
}
}