I am building some audit/compliance reports and am curious if there is a built in mechanism to highlight values out of spec. I think my ideal scenario would be something like this, where the return value is added to the css class for the cell that contains the value

 Table::create(array(
        ...
        "columns"=>array(
            "col_name"=>array(
                "label"=>"Cost",
                "filter"=>function($value) {
                    switch ($value) {
                        case ($value < $minimum_accepted_value):
                            return "red";
                        case (($value > $minimum_accepted_value) && ($value < $maximum_accepted_value)):
                            return "green";
                        case ($value > $maximum_accepted_value):
                            return "orange";
                        default: 
                            return;
                    }
                }
            )
        ),
        ...
    ));