Typescript class method this pointer binding

// Class this Pointer use 
class Log{
    constructor() {
        // by printX Function binding current class object , Solve the call this.print I can't find it. print Method 
        this.printX = this.printX.bind(this);
        // Make this Pointer auto binding method 
        this.printY = ((y='y') => {
            this.print(`this allow auto bind this,${y}`);
        });
    }
    print(obj){
        console.log(obj);
    }
    printX(x='a'){
        this.print(`hi,${x}`);// Used this The pointer 
    }
    printY(x='a'){
        this.print(`bind test :,${x}`);// Used this The pointer 
    }
}

let l = new Log();
l.printX('HELLO');// It can be called normally 
// Export form call error 
const {printX,printY}=l;// Export from object 
//printX Called print No way to find ,this invalid 
//printX('WOW');//Cannot read properties of undefined (reading 'print')
// By binding this Form solution , Function binding is added to the constructor above this object 
console.log('printX Method is bound this The pointer , Problem solving ');
printX('WOW');
console.log('printY Method is automatically bound by arrow function this The pointer , Problem solving ');
printY('===world===');

// Automatically bind when getting function methods through the proxy this
function proxyAutoBindThis(obj){
    let c = new WeakMap();// cache 
    // The agent handles events 
    let h = {
        get (t,k){
            let v = Reflect.get(t,k);
            if (typeof v!=='function'){return v;}// It's not a function that doesn't handle , Go straight back to 
            if (!c.has(v)){c.set(v,v.bind(t));}// Do not bind repeatedly 
            return c.get(v);// Return bound this Function of 
        }
    };
    let p = new Proxy(obj,h);// For the incoming obj Set up agent 
    return p;// Return the agent object 
}

class A{
    test(obj){
        console.log(obj);
    }
    test1(obj=null){
        this.test(`${obj}===>,test1`);// Use this The pointer 
    }
    test2(obj=null){
        this.test(`${obj}===>,test2`);// Use this The pointer 
    }
}
let a = new A();// Instantiation A object a
let objBindThisByProxy = proxyAutoBindThis(a);// All methods are automatically bound this
let {test1,test2}=objBindThisByProxy;// Export from agent 
// Class object call 
a.test1(' Class object call ');
a.test2(' Class object call ');
// Call through the agent 
test1(' Call through the agent ');
test2(' Call through the agent ');