@Override public Iterator<PreviewLayer> iterator(final long first, final long count) { Iterator<PreviewLayer> iterator = filteredItems(first, count); if (iterator instanceof CloseableIterator) { // don't know how to force wicket to close the iterator, lets return // a copy. Shouldn't be much overhead as we're paging try { return Lists.newArrayList(iterator).iterator(); } finally { CloseableIteratorAdapter.close(iterator); } } else { return iterator; } }