return Typ[String]
		}
	}
	return t
}

// maxType returns the "largest" type that encompasses both x and y.
// If x and y are different untyped numeric types, the result is the type of x or y
// that appears later in this list: integer, rune, floating-point, complex.
// Otherwise, if x != y, the result is nil.
func maxType(x, y Type) Type {
	// We only care about untyped types (for now), so == is good enough.

			return Typ[String]
		}
	}
	return t
}

// maxType returns the "largest" type that encompasses both x and y.
// If x and y are different untyped numeric types, the result is the type of x or y
// that appears later in this list: integer, rune, floating-point, complex.
// Otherwise, if x != y, the result is nil.
func maxType(x, y Type) Type {
	// We only care about untyped types (for now), so == is good enough.

			if maxUntyped == nil {
				maxUntyped = make(map[*TypeParam]Type)
			}
			max := maxUntyped[tpar]
			if max == nil {
				max = arg.typ
			} else {
				m := maxType(max, arg.typ)
				if m == nil {
					err.addf(arg, "mismatched types %s and %s (cannot infer %s)", max, arg.typ, tpar)
					return nil
				}
				max = m
			}
			maxUntyped[tpar] = max
		}
	}

			if maxUntyped == nil {
				maxUntyped = make(map[*TypeParam]Type)
			}
			max := maxUntyped[tpar]
			if max == nil {
				max = arg.typ
			} else {
				m := maxType(max, arg.typ)
				if m == nil {
					err.addf(arg, "mismatched types %s and %s (cannot infer %s)", max, arg.typ, tpar)
					return nil
				}
				max = m
			}
			maxUntyped[tpar] = max
		}
	}

	if x.mode == invalid || isTyped(x.typ) || !isValid(target) {
		return x.typ, nil, 0
	}
	// x is untyped

	if isUntyped(target) {
		// both x and target are untyped
		if m := maxType(x.typ, target); m != nil {
			return m, nil, 0
		}
		return nil, nil, InvalidUntypedConversion
	}

	switch u := under(target).(type) {
	case *Basic:
		if x.mode == constant_ {

	if x.mode == invalid || isTyped(x.typ) || !isValid(target) {
		return x.typ, nil, 0
	}
	// x is untyped

	if isUntyped(target) {
		// both x and target are untyped
		if m := maxType(x.typ, target); m != nil {
			return m, nil, 0
		}
		return nil, nil, InvalidUntypedConversion
	}

	if x.isNil() {
		assert(isUntyped(x.typ))
		if hasNil(target) {
			return target, nil, 0
		}

func mapaccess1_fat(mapType *byte, hmap map[any]any, key *any, zero *byte) (val *any)
func mapaccess2(mapType *byte, hmap map[any]any, key *any) (val *any, pres bool)
func mapaccess2_fast32(mapType *byte, hmap map[any]any, key uint32) (val *any, pres bool)
func mapaccess2_fast64(mapType *byte, hmap map[any]any, key uint64) (val *any, pres bool)

    Map<Object, Object> createEmptyMap(Class<?> mapType) {
        if (mapType.isAssignableFrom(LinkedHashMap.class)) {
            return new LinkedHashMap<Object, Object>();
        }
        if (mapType.isAssignableFrom(TreeMap.class)) {
            return new TreeMap<Object, Object>();
        }
        throw new UnsupportedOperationException(String.format("Cannot convert a Map to type %s.", mapType.getName()));
    }

type slice []int

type maptype map[int]int

func MakePrivateCollection() *Collection {
	return &Collection{
		root: unsafe.Pointer(&nodeLoc{}),
	}
}

func MakePrivateCollection2() *Collection {
	return &Collection{
		root: unsafe.Pointer(&slice{}),
	}
}
func MakePrivateCollection3() *Collection {
	return &Collection{
		root: unsafe.Pointer(&maptype{}),
	}

package main

import (
	"math/rand"
	"runtime"
	"sync"
)

func mapTypes() []MapType {
	// TODO(bradfitz): bunch more map types of all different key and value types.
	// Use reflect.MapOf and a program to generate lots of types & struct types.
	// For now, just one:
	return []MapType{intMapType{}}
}

type MapType interface {
	NewMap() Map
}

type Map interface {
	AddItem()
	DelItem()
	Len() int