public function addLabelColumn($labelColumn)
    {
        if (is_array($labelColumn)) {
            foreach ($labelColumn as $label) {
                $this->addLabelColumn($label);
            }
            return;
        }
        $this->labelColumns[$labelColumn] = true;
    }
public function addLabelColumn($labelColumn)
    {
        if (is_array($labelColumn)) {
            foreach ($labelColumn as $label) {
                $this->addLabelColumn($label);
            }
            return;
        }
        $this->labelColumns[$labelColumn] = true;
    }
public function addLabelColumn ( $ labelColumn ) { if ( is_array ( $ labelColumn ) ) { foreach ( $ labelColumn as $ label ) { $ this -> addLabelColumn ( $ label ) ; } return ; } $ this -> labelColumns [ $ labelColumn ] = true ; }
Add a label column.
Labels are the columns that are replaced with "Others" after the limit.

@param string|array $labelColumn
Add a label column . Labels are the columns that are replaced with Others after the limit .