@Override
    public FileResourceFetcher exceptionHandler(Handler<Throwable> exceptionHandler) {
        this.exceptionHandler = exceptionHandler;
        return this;
    }
Fetch a file from the local filesystem.

@author Marc Savy {@literal <marc@rhymewithgravy.com>}
gateway/engine/vertx-polling/src/main/java/io/apiman/gateway/engine/vertx/polling/fetchers/FileResourceFetcher.java