Looking-Glass/Assets/scripts/Unlocker.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

// when Unlock() is called, sets locked to false for all attached Lockables

public class Unlocker : MonoBehaviour
{
    public List<Lockable> attachedLockables = new List<Lockable>();
    public AudioSource unlockSound;
    public void Unlock(){
        foreach(Lockable lockable in attachedLockables){
            lockable.locked = false;
        }
        unlockSound.Play();
    }
}