反射是否支持，调用Reflect编译错误

class MyClass { 
  value: number = 9; 
 
  fun() { 
    console.log('fun print') 
  } 
} 
 
function TestFun(par: number) { 
  console.log('TestFun print, par:' + par) 
} 
 
let aClass = new MyClass(); 
Reflect.set(aClass, 'key', 'keyvalue'); 
let str: string = Reflect.get(aClass, 'key'); 
console.log(str) 
 
Reflect.set(aClass, 'keyFun', () => { 
  console.log('lan print.') 
}); 
let lanFun: Function = Reflect.get(aClass, 'keyFun'); 
lanFun(); 
 
Reflect.set(aClass, 'keyFun2', TestFun); 
let globeFun: Function = Reflect.get(aClass, 'keyFun2'); 
globeFun(4); 
 
Reflect.set(aClass, 'keyFun3', aClass.fun); 
let classFun: Function = Reflect.get(aClass, 'keyFun3'); 
classFun();