v2版本正式上线测试版

static/zTree3/api/en/fn.zTree._z.html

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+<div class="apiDetail">
+<div>
+    <h2><span>JSON</span><span class="path">$.fn.zTree.</span>_z</h2>
+    <h3>Overview<span class="h3_info">[ depends on <span class="highlight_green">jquery.ztree.core</span> js ]</span></h3>
+    <div class="desc">
+        <p></p>
+        <div class="longdesc">
+                <p>All of the internal methods in zTree v3.x are available through '$. fn.zTree._z', 
+                    use this if you want to develop your own zTree plug-ins.</p>
+                <p class="highlight_red">Unless you are writing a plugin, 
+                    you should not use this object.</p>
+        </div>
+    </div>
+</div>
+</div>