UnityEditor.TreeViewDataSource.GetVisibleRows C# (CSharp) Method

        public virtual List<TreeViewItem> GetVisibleRows()
        {
            if ((this.m_VisibleRows == null) || this.m_NeedRefreshVisibleFolders)
            {
                if (this.m_RootItem != null)
                {
                    if (this.m_TreeView.isSearching)
                    {
                        this.m_VisibleRows = this.Search(this.m_RootItem, this.m_TreeView.searchString.ToLower());
                    }
                    else
                    {
                        this.m_VisibleRows = this.ExpandedRows(this.m_RootItem);
                    }
                }
                else
                {
                    Debug.LogError("TreeView root item is null. Ensure that your TreeViewDataSource sets up at least a root item.");
                    this.m_VisibleRows = new List<TreeViewItem>();
                }
                this.m_NeedRefreshVisibleFolders = false;
                if (this.onVisibleRowsChanged != null)
                {
                    this.onVisibleRowsChanged();
                }
                this.m_TreeView.Repaint();
            }
            return this.m_VisibleRows;
        }