boolean isCollection = false;
            boolean isMap = false;
            boolean isProperties = false;
            if (!isArray) {
                try {
                    // assuming Type is available in current ClassLoader
                    isCollection = Collection.class.isAssignableFrom(Class.forName(param.getType()));
                    isMap = Map.class.isAssignableFrom(Class.forName(param.getType()));

func (t *DeclType) IsList() bool {
	return t.KeyType == nil && t.ElemType != nil && t.Fields == nil
}

// IsMap returns whether the declaration is a 'map' type which defines parameterized key and
// element types, but not fields.
func (t *DeclType) IsMap() bool {
	return t.KeyType != nil && t.ElemType != nil && t.Fields == nil
}

	return kindOf(value) == reflect.String
}

// IsPtr reports whether value is a ptr type.
func IsPtr(value any) bool {
	return kindOf(value) == reflect.Ptr
}

// IsMap reports whether value is a map type.
func IsMap(value any) bool {
	return kindOf(value) == reflect.Map
}

// IsMapPtr reports whether v is a map ptr type.
func IsMapPtr(v any) bool {
	t := reflect.TypeOf(v)

	}
	if expT.GetListType() == nil {
		t.Errorf("got %v, wanted CEL list type", expT)
	}
}

func TestTypes_MapType(t *testing.T) {
	mp := NewMapType(StringType, IntType, -1)
	if !mp.IsMap() {
		t.Error("map type not identifiable as map")
	}
	if mp.TypeName() != "map" {
		t.Errorf("got %s, wanted map", mp.TypeName())
	}
	if mp.DefaultValue() == nil {
		t.Error("got nil zero value for map type")
	}

    this?.takeIf { it.isNotEmpty() }
        ?.joinToString(separator = ", ", prefix = "<", postfix = ">", transform = transform)
        ?: ""


private
val ApiTypeUsage.isGroovyNamedArgumentMap
    get() = isMap && (
        typeArguments.all { it.isAny }
            || typeArguments.all { it.isStarProjectionTypeUsage }
            || (typeArguments[0].isString && (typeArguments[1].isStarProjectionTypeUsage || typeArguments[1].isAny))

	}

	src.Range(func(fd protoreflect.FieldDescriptor, v protoreflect.Value) bool {
		switch {
		case fd.IsList():
			o.mergeList(dst.Mutable(fd).List(), v.List(), fd)
		case fd.IsMap():
			o.mergeMap(dst.Mutable(fd).Map(), v.Map(), fd.MapValue())
		case fd.Message() != nil:
			mergeFn, exists := o.customMergeFn[fd.Message().FullName()]
			if exists {
				mergeFn(dst.Mutable(fd).Message(), v.Message())

}

// Set sets out with the value at path from node. out is not set if the path doesn't exist or the value is nil.
func Set(val, out any) error {
	// Special case: map out type must be set through map ptr.
	if util.IsMap(val) && util.IsMapPtr(out) {
		reflect.ValueOf(out).Elem().Set(reflect.ValueOf(val))
		return nil
	}
	if util.IsSlice(val) && util.IsSlicePtr(out) {
		reflect.ValueOf(out).Elem().Set(reflect.ValueOf(val))

func mapfn(name string, t *types.Type, isfat bool) ir.Node {
	if !t.IsMap() {
		base.Fatalf("mapfn %v", t)
	}
	if mapfast(t) == mapslow || isfat {
		return typecheck.LookupRuntime(name, t.Key(), t.Elem(), t.Key(), t.Elem())
	}
	return typecheck.LookupRuntime(name, t.Key(), t.Elem(), t.Elem())
}

func mapfndel(name string, t *types.Type) ir.Node {
	if !t.IsMap() {
		base.Fatalf("mapfn %v", t)
	}

		}
		// TODO: The case of deleting a list.list.node element is not currently supported.
		return fmt.Errorf("cannot delete path: unsupported parent.parent type %T for delete", nc.Parent.Parent.Node)
	case util.IsMap(nc.Parent.Node):
		return util.DeleteFromMap(nc.Parent.Node, nc.Parent.KeyToChild)
	default:
	}
	return fmt.Errorf("cannot delete path: unsupported parent type %T for delete", nc.Parent.Node)
}

}

// Equal returns true if the maps are of the same size, have the same keys, and the key-values
// from each map are equal.
func (m *MapValue) Equal(other ref.Val) ref.Val {
	oMap, isMap := other.(traits.Mapper)
	if !isMap {
		return types.MaybeNoSuchOverloadErr(other)
	}
	if m.Size() != oMap.Size() {
		return types.False
	}
	for name, field := range m.fieldMap {
		k := types.String(name)