es.
func Map(dst, src interface{}, opts ...func(*Config)) error {
	return _map(dst, src, opts...)
}

// MapWithOverwrite will do the same as Map except that non-empty dst attributes will be overridden by
// non-empty src attribute values.
// Deprecated: Use Map(…) with WithOverride
func MapWithOverwrite(dst, src interface{}, opts ...func(*Config)) error {
	return _map(dst, src, append(opts, WithOverride)...)
}

func _map(dst, src interface{}, opts ...func(*Config)) error {
	var (
		vDst, vSrc reflect.Value
		err        error
	)
	config := &Config{}

	for _, opt := range opts {
		opt(config)
	}

	if vDst, vSrc, err = resolveValues(dst, src); err != nil {
		return err
	}
	// To be friction-less, we redirect equal-type arguments
	// to deepMerge. Only because arguments can be anything.
	if vSrc.Kind() == vDst.Kind() {
		return deepMerge(vDst, vSrc, make(map[uintptr]*visit), 0, config)
	}
	switch vSrc.Kind() {
	case reflect.Struct:
		if vDst.Kind() != reflect.Map {
			return ErrExpectedMapAsDestination
		}
	case reflect.Map:
		if vDst.Kind() != reflect.Struct {
			return ErrExpectedStructAsDestination
		}
	default:
		return ErrNotSupported
	}
	return deepMap(vDst, vSrc, make(map[uintptr]*visit), 0, config)
}
