The compiler generates a method for each supported remote procedure defined in the interface and properties for the arguments of the RPCs.
这个编译器为定义在接口中的每个支持的远程过程创建方法，并为RPC的参数生成属性。
2
It comes with a port type compiler to generate a stub that allows invocation using the abstract service interface.
提供端口类型编译器来生成允许使用抽象服务接口的调用的存根。
3
By introducing code written against the interface and having multiple implementations of the interface, there are fewer optimizations that can be done by the GWT compiler.