gistfile1.txt

    /** private: method[createOutputConfig] */
    createOutputConfig: function() {
        var tree = gxp.plugins.LayerManager.superclass.createOutputConfig.apply(this, arguments);
        Ext.applyIf(tree, Ext.apply({
            listeners: {
                'rendernode': function(node) {
                    if (node.layer && node.component) {
                        if (node.layer.getVisibility()) {
                            node.component.show();
                        } else {
                            node.component.hide();
                        }
                    }
                },
                delay: 500
            },
            cls: "gxp-layermanager-tree",
            lines: false,
            useArrows: true,
            plugins: [{
                ptype: "gx_treenodecomponent"
            }]
        }, this.treeConfig));

        return tree;
    },