function linkifier(title, url, lineNumber, columnNumber)
    {
        var isExternal = !WebInspector.resourceForURL(url) && !WebInspector.networkMapping.uiSourceCodeForURLForAnyTarget(url);
        var urlNode = WebInspector.linkifyURLAsNode(url, title, undefined, isExternal);
        if (typeof lineNumber !== "undefined") {
            urlNode.lineNumber = lineNumber;
            if (typeof columnNumber !== "undefined")
                urlNode.columnNumber = columnNumber;
        }

        return urlNode;
    }
@param {string} title
@param {string} url
@param {number=} lineNumber
@param {number=} columnNumber
@return {!Node}