boolean hasFile(String fileReference) {
        return hasFile(new FileReference(fileReference));
    }
@Test
    public void requireThatFileReferenceWithDirectoryCanBeFound() throws IOException {
        File dir = getFileServerRootDir();
        IOUtils.writeFile(dir + "/124/subdir/f1", "test", false);
        IOUtils.writeFile(dir + "/124/subdir/f2", "test", false);
        assertTrue(fileServer.hasFile("124/subdir"));
    }