UnityEngine.UI.FontUpdateTracker.TrackText C# (CSharp) Method

        public static void TrackText(Text t)
        {
            if (t.font != null)
            {
                List<Text> list;
                m_Tracked.TryGetValue(t.font, out list);
                if (list == null)
                {
                    list = new List<Text>();
                    m_Tracked.Add(t.font, list);
                    Font.textureRebuilt += new Action<Font>(FontUpdateTracker.RebuildForFont);
                }
                for (int i = 0; i < list.Count; i++)
                {
                    if (list[i] == t)
                    {
                        return;
                    }
                }
                list.Add(t);
            }
        }

 public override void OnRebuildRequested()
 {
     FontUpdateTracker.UntrackText(this);
     FontUpdateTracker.TrackText(this);
     this.cachedTextGenerator.Invalidate();
     base.OnRebuildRequested();
 }