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我是 aws 服务的新手，过去两天我一直在尝试在 android 上实现 Amplify.API.mutate 查询，但我遇到了一个奇怪的错误，我正在努力理解和解决。错误片段
我正在使用private TreeNode root;创建动态树。
private TreeNode root;
我用
<p:tree value="#{bean.root}" var="node"> <p:treeNode> h:outputText value="#{node}" />
