** Implement to resolve URIs to a 'Resource'.** ** 'UriResolver' implementations should be contributed to the 'UriResolvers' service:** ** @Contribute { serviceType=UriResolvers# }** internal static Void contributeUriResolvers(Configuration config) {** resolver := MyUriResolver()** config.add(resolver)** }** ** If your resolver requires dependencies to be injected then it should be *autobuilt*.** It is also good practice to contribute the instance with an ID, so others may override it if they wish:** ** @Contribute { serviceType=UriResolvers# }** internal static Void contributeUriResolvers(Configuration config) {** resolver := config.autobuild(MyUriResolver#)** config["myResolver"] = resolver** }** mixin UriResolver {** Return 'null' if the URI is not applicable to this resolver.abstract Resource? resolve(Str uri)}