对不起。我的错。一切工作正常。我只是复制'tooltip'选项。我想用的工具提示被工具提示覆盖，我忘了从我的代码中删除）

I have to display some special information when my mouse is over a concrete point in a chart that is provided by Highcharts. I am using the Highcharts extension for Yii2.

My Code

'tooltip' => [
               'enabled' => true,
               'footerFormat' => true,
               'formatter' => "js:function() {
                    return 'my special information';
                }"
             ],

The data that comes from controller is correct. However there is nothing different - tooltip is still the default

What am I doing wrong?

Sorry. My bad. All is working fine. I just duplicate 'tooltip' option. And my tooltip that i want to use was override by tooltip that i forgot to remove from my code)