/// <summary>
/// 设置父节点
/// </summary>
/// <param name="parent">父节点</param>
public void setParent(node parent)
{
this.parent = parent;
}
/// <summary>
/// 从节点删除子节点
/// </summary>
/// <param name="child">子节点</param>
public void removeChildNode(node child)
{
this.childs.Remove(child);
}