嵌套节点

¥Nested Nodes

另一个关键特性是嵌套节点（甚至嵌套流）。

¥Another key feature is nested nodes (or even nested flows).

你可以定义节点的父节点，然后将其嵌套在该节点内。你还可以定义节点的边界，例如，节点是否可以拖动到其父节点之外，或者是否包含在父节点中，甚至可以让 Vue Flow 扩展节点的区域以容纳其所有子节点。

¥You can define parents of a node, which are then nested inside that node. You can also define the boundaries of a node, i.e. if the node can be dragged outside it's parent or if it's contained to the parent or even let Vue Flow extend the area of a node to fit all it's children.