Note that your service extends the GWT marker interface RemoteService.
注意，服务扩展了GWT标记器接口RemoteService。
Having to extend EJBObject doesn't seem so bad, because that's just a typical marker interface.
扩展EJBObject好像并不坏，因为它只是一个典型的标记接口。
For one, the class must implement the interface com.google.gwt.user.client.rpc.IsSerializable, which is a marker interface, defining no methods.
举例来说，该类必须实现接口com . google . gwt . user . client . rpc . IsSerializable，该接口是一个标记接口，不定义任何方法。
This is a marker interface and has no methods.
这是一个标记接口，没有任何方法。
To append an error message, you need to create a marker (interface IMarker) on a resource.
要添加错误消息，需要在资源上创建一个记号(接口IMarker)。
To append an error message, you need to create a marker (interface IMarker) on a resource.
要添加错误消息，需要在资源上创建一个记号(接口IMarker)。
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