Присвоение свойства возвращаемое значение функции в классе

 
class Person
{
constructor(name)
{
    this.name = name;

	const fm= () => {
	return "XXXXXX";
	}
	const fn = async () => {
	return "XXXXXX";
	}
this.y = fm();
this.z = fn();
	
}
}
/*y will just be a assigned a string*/
 /*z will be assigned a promise*/
Javasper