function propertySorter(a, b)
        {
            if (a.startsWith("-webkit") ^ b.startsWith("-webkit"))
                return a.startsWith("-webkit") ? 1 : -1;
            var canonicalName = WebInspector.CSSMetadata.canonicalPropertyName;
            return canonicalName(a).compareTo(canonicalName(b));
        }
@param {string} a
@param {string} b
@return {number}