public override Vector2 GetTotalSize(List<TreeViewItem> rows)
{
if (this.m_RowRects.Count == 0)
{
return new Vector2(1f, 1f);
}
Rect rect = this.m_RowRects[this.m_RowRects.Count - 1];
return new Vector2(base.GetMaxWidth(rows) + 10f, rect.yMax);
}