UnityEditor.AudioMixersDataSource.FetchData C# (CSharp) Method

        public override void FetchData()
        {
            int depth = -1;
            bool flag = base.m_TreeView.state.expandedIDs.Count == 0;
            base.m_RootItem = new TreeViewItem(0x3c34eb12, depth, null, "InvisibleRoot");
            this.SetExpanded(base.m_RootItem.id, true);
            List<AudioMixerController> list = this.m_GetAllControllersCallback.Invoke();
            base.m_NeedRefreshRows = true;
            if (list.Count > 0)
            {
                List<AudioMixerItem> items = Enumerable.ToList<AudioMixerItem>(Enumerable.Select<AudioMixerController, AudioMixerItem>(list, new Func<AudioMixerController, AudioMixerItem>(this, (IntPtr) this.<FetchData>m__0)));
                foreach (AudioMixerItem item in items)
                {
                    this.SetChildParentOfMixerItem(item, items);
                }
                this.SetItemDepthRecursive(base.m_RootItem, -1);
                this.SortRecursive(base.m_RootItem);
                if (flag)
                {
                    base.m_TreeView.data.SetExpandedWithChildren(base.m_RootItem, true);
                }
            }
        }