What can I do to label the Columns. In all ColumnCharts (Chartjs, D3, Google) the columns are labeled by the original columnname.

        ColumnChart::create(array(
            "title"=>"Vergleich",
            "dataSource"=>$groups_data_main_survey_object->whereIn('title', array('AT01','AT02')),
            "columns"=>array(
                "question",
                "group_0_a_avg"=>array(
                    "label" => "IST",
                    "type"=>"number"
                ),
                "group_0_b_avg"=>array(
                    "label" => "SOLL",
                    "type"=>"number"
                ),
                "group_0_difference_avg"=>array(
                    "label" => "Differenz",
                    "type"=>"number"
                ),
            ),
            
        ));

The issue is the KoolReport object. By transforming it an array the label and other column options are working.

"dataSource"=>$groups_data_main_survey_object->whereIn('title', array('AT01','AT02'))->toArray(),