read only check if this middleware instance has been initialized . concode_field_sep Yoke yoke concode_elem_sep String mount concode_elem_sep boolean initialized concode_field_sep Middleware init concode_elem_sep FileSystem fileSystem concode_elem_sep YokeSecurity security concode_elem_sep EventBus eventBus concode_elem_sep Vertx vertx concode_elem_sep boolean isErrorHandler
boolean function ( ) { return initialized ; }