/// <summary>
/// Adds a child item
/// </summary>
/// <param name="in_child"></param>
public void AddChild(TreeViewItemBase in_child)
{
in_child.SetParent(this);
m_children.Add(in_child);
}
/// <summary>
/// Sets item logical parent
/// </summary>
/// <param name="in_parent"></param>
public void SetParent(TreeViewItemBase in_parent)
{
m_item_parent = in_parent;
}