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The preceding implementation works fine when the only objects we want to tie to the grid are children of our ___snap-to-grid___ GameObject. However, if we don't want to require affected objects to be such children, then we can use the singleton pattern to allow a GameObject anywhere in the Hierarchy window to get a reference to the GridGizmo component. Do the following to adapt this recipe to use this approach:

1. Update the contents of the GridGizmo.cs #C script class so that it matches the following:

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

public class GridGizmo : MonoBehaviour
{
  private static GridGizmo _instance = null;

  public static void SetInstance(GridGizmo instance) {
    _instance = instance;
  }

  public static GridGizmo GetInstance() {
    if(_instance == null){
      throw new System.Exception("error - no GameObject has GridGizmo component to snap to ...");
    }

    return _instance...