详细内容如下：
Widgetset ‘com.vaadin.DefaultWidgetSet’ does not contain an implementation for com.vaadin.addon.charts.Chart.Check the connector’s @Connect mapping, the widgetset’s GWT module description file and re-compile you widgetset. In case you have downloaded a vaadin add-on package,you might want to refer to add-on instruction.
这表示什么含义呢