    public function setHidden($pValue = self::PROTECTION_INHERIT) {
		if ($this->_isSupervisor) {
			$styleArray = $this->getStyleArray(array('hidden' => $pValue));
			$this->getActiveSheet()->getStyle($this->getSelectedCells())->applyFromArray($styleArray);
		} else {
			$this->_hidden = $pValue;
		}
		return $this;
    }