ArkTS是否支持自定义装饰器？

function TestClassDecorator (target: Function) {} 
function TestMemberDecorator (target: testClass, memberName: String) {} 
function TestFunDecorator (target: testClass, propertyName: String, descriptor: PropertyDescriptor) {} 
function TestArgDecorator (target: Function, methodName: String, paramIndex: Number) {} 
 
@TestClassDecorator 
class testClass { 
@TestMemberDecorator 
count: number = 123; 
 
@TestFunDecorator 
TestFun(@TestArgDecorator param: string) {} 
}