function innerCallFrameAnchorFromStackTrace(stackTrace)
    {
        if (!stackTrace || !stackTrace.length)
            return null;
        if (showBlackboxed)
            return stackTrace[0];
        for (var i = 0; i < stackTrace.length; ++i) {
            var script = debuggerModel && debuggerModel.scriptForId(stackTrace[i].scriptId);
            var blackboxed = script ?
                WebInspector.BlackboxSupport.isBlackboxed(script.sourceURL, script.isContentScript()) :
                WebInspector.BlackboxSupport.isBlackboxedURL(stackTrace[i].url);
            if (!blackboxed)
                return stackTrace[i];
        }
        return null;
    }
@param {?Array.<!ConsoleAgent.CallFrame>=} stackTrace
@return {?ConsoleAgent.CallFrame}