如何获取ezui tree 所有子节点

$('#tt').tree({
                onClick: function(node){
           　　　var n=    $('#tt').tree('getChildren',node.target);
                 for(var i = 0;i<n.length;i++){
                     var childrenNode = n[i];
                        var isOrLeaf = $('#tt').tree('isLeaf',childrenNode.target);
                        if(isOrLeaf==true){
                            console.log(childrenNode.text+'是子节点！,id是：'+childrenNode.id);
                        }
                 }  
                }
        });