public CellProperties getColProperties(int col) {
        while (colProperties.size() <= col) {
            colProperties.add(new CellProperties());
        }
        return colProperties.get(col);
    }
Helper class in order to write HTML tables
clustercontroller-core/src/main/java/com/yahoo/vespa/clustercontroller/core/status/statuspage/HtmlTable.java