RxVRTK_InteractableObjectSample.cs

using RxVRTK;
using UniRx;
using UnityEngine;

public class SomeObject : RxVRTK_InteractableObject
{
    protected void Start()
    {
        this.StartUsingAsObservable()
            .Subscribe(user =>
            {
                Debug.Log(user.name + " is using this object!");
            });
    }
}