protected function _createSubHeader($subheader = '', $width = [], $level = 0) {
		if (empty($width)) {
			return;
		}

		$this->tcpdf->SetTextColor(0);
		$this->tcpdf->SetDrawColor(128, 0, 0);
		$this->tcpdf->SetLineWidth(0.3);
		if ($level > 3) {
			$level = 3;
		}
		$fontSize = 20 * (1 - $level / 4);

		$this->tcpdf->SetFont('', 'BI', $fontSize);
		$height = $this->_rowHeight['SubHeader'];
		$cells = [];
		$cells[] = [array_sum($width), $height, $subheader, 0, 'L', false, 0, '', '',
			true, 0, false, true, $height, 'M', true];
		$this->_writeMulticells($cells);
	}