protected function printColumns()
    {
        return is_array($this->printColumns) ? $this->toColumnsCollection($this->printColumns) : $this->getPrintColumnsFromBuilder();
    }
protected function printColumns()
    {
        return is_array($this->printColumns) ? $this->toColumnsCollection($this->printColumns) : $this->getPrintColumnsFromBuilder();
    }
protected function printColumns ( ) { return is_array ( $ this -> printColumns ) ? $ this -> toColumnsCollection ( $ this -> printColumns ) : $ this -> getPrintColumnsFromBuilder ( ) ; }
Get printable columns.

@return array|string
Get printable columns .