func NewSchemeType(raw string) SchemeType {
	switch raw {
	case "stun":
		return SchemeTypeSTUN
	case "stuns":
		return SchemeTypeSTUNS
	case "turn":
		return SchemeTypeTURN
	case "turns":
		return SchemeTypeTURNS
	default:
		return SchemeType(Unknown)
	}
}
NewSchemeType defines a procedure for creating a new SchemeType from a raw
string naming the scheme type.
package ice
import (
	"net"
	"net/url"
	"strconv"
)
type SchemeType int
const Unknown = iota
const (
	SchemeTypeSTUN SchemeType = iota + 1
	SchemeTypeSTUNS
	SchemeTypeTURN
	SchemeTypeTURNS
)