manipulating "showTotal" output view

[mer30hamid]

I have a column that contains Total times in Minutes (it has int type) that I want to convert it to "H:i" format,
I can do it using "displayAs" but only for editColumns, for example:

            return $ExcelReport->of($title, $meta, $queryBuilder, $columns)
                ->editColumns(
                     ['Total times'],
                    ['displayAs' => function($result) {
                        return gmdate("H:i", $result->totalTimes);
                    }])
                ->groupBy('Customer Name')
                ->showTotal([ 
                    'Total times' => 'point' 
                ])
                ->make()
                ->download('CustomerServiceReport.xlsx');

but I can't find any way to manipulate "showTotal" (Grand Total) output view
Is it possible to use "displayAs" for it? any idea?

[mer30hamid]

My problem solved with manipulating published view of the "laravel-report-generator"

php artisan vendor:publish --provider="jimmyjs\reportgenerator\serviceprovider"

so I edited files in this path:
resources\views\vendor\laravel-report-generator