public synchronized boolean updateTo(long requestedVersion) throws Throwable {
        return updateTo(new HollowConsumer.VersionInfo(requestedVersion));
    }
@Test
    public void testUpdateTo_updateToLatestButNoVersionsRetrieved_throwsException() throws Throwable {
        expectedException.expect(IllegalArgumentException.class);
        expectedException.expectMessage("Could not create an update plan, because no existing versions could be retrieved.");
        subject.updateTo(VERSION_LATEST);
    }