public function setValue($cell, $row, $value, $border=false){
        $this->engine->getActiveSheet()->setCellValueByColumnAndRow($cell, $row, $value);
        $this->x = $this->getColumnName($cell);
        $this->y = $row;
        if($border){
            $this->engine->getActiveSheet()->getStyle("{$this->x}{$this->y}")->applyFromArray($this->style);
        }
        return $this;
    }