div.fourth-case
h2 Fourth Case
Tree(:value="treeData" ref="tree" :rootNode="{$droppable: true}" :cloneWhenDrag="true" :allowOutOfBounds="false")
div(slot-scope="{node, index, path, tree}")
b(v-if="node.children && node.children.length > 0" @click="tree.toggleFold(node, path)") {{node.$folded ? '+' : '-'}}
input(type="checkbox" :checked="node.$checked" @change="tree.toggleCheck(node, path)")
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span {{node.text}}