The leaf node's lock, the leaf node will lock the 'isParent' attribute to false.
Default: false
true means: lock the leaf node, and the node which 'isParent' attribute is false can't add child nodes.
false means: don't lock the leaf node, and the node which 'isParent' attribute is false can add child nodes.
var setting = {
data: {
keep: {
leaf: true
}
}
};
......