} 
} 
    getRuleByLine: function(styleSheet, line)    {        if (!domUtils)            return null;                var cssRules = styleSheet.cssRules;        for (var i = 0; i < cssRules.length; ++i)        {            var rule = cssRules[i];            if (rule instanceof CSSStyleRule)            {                var ruleLine = domUtils.getRuleLine(rule);                if (ruleLine >= line)                    return rule;            }        }            },
2454	/local1/tlutelli/issta_data/temp/all_js/javascript/2007_temp/2007/2454/e1d42ad3fad63b72826a4e2ed0726866484c9ac3/css.js/buggy/extension/content/firebug/css.js