'use strict';

class Person {

constructor(name, surname) {

this.name = name;

this.surname = surname;

}

getFullName() {

const { name = '', surname = '' } = this;

return name + ' ' + surname;

}

}

class PersonProxy {

constructor(person) {

this.person = person;

}

getFullName() {

let fullName = this.person.getFullName();

if (fullName.startsWith(' ') || fullName.endsWith(' ')) {

fullName = fullName.trim();

}

return fullName;

}

}

// Usage

const proxy = new PersonProxy(new Person('Marcus', 'Antonin'));

const fullName = proxy.getFullName();

console.dir({ fullName });