def get_app(self, module_name): 
        cls = AppBase.find(module_name)
        if cls is None: return None
        
        for app in self.apps:
            if type(app) == cls:
                return app
            
        raise KeyError("The %s app was not found in the router!" % module_name)
build() method returns list of built hunks.
dataset/ETHPy150Open rapidsms/rapidsms-core-dev/lib/rapidsms/router.py/Router.get_app--crossover with--dataset/ETHPy150Open miracle2k/webassets/tests/test_bundle_build.py/TestBuildVarious.test_build_return_value