var tWireType = mustGetTypeInfo(wireTypeType).id
var wireTypeUserInfo *userTypeInfo // userTypeInfo of wireType

func init() {
	// Some magic numbers to make sure there are no surprises.
	checkId(16, tWireType)
	checkId(17, mustGetTypeInfo(reflect.TypeFor[arrayType]()).id)
	checkId(18, mustGetTypeInfo(reflect.TypeFor[CommonType]()).id)
	checkId(19, mustGetTypeInfo(reflect.TypeFor[sliceType]()).id)

			}
		case reflect.Struct:
			// Generate a closure that calls out to the engine for the nested type.
			getEncEngine(userType(typ), building)
			info := mustGetTypeInfo(typ)
			op = func(i *encInstr, state *encoderState, sv reflect.Value) {
				state.update(i)
				// indirect through info to delay evaluation for recursive structs
				enc := info.encoder.Load()