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getBorderChars example

    private function renderRowSeparator(int $type = self::SEPARATOR_MID, string $title = null, string $titleFormat = null): void
    {
        if (!$count = $this->numberOfColumns) {
            return;
        }

        $borders = $this->style->getBorderChars();
        if (!$borders[0] && !$borders[2] && !$this->style->getCrossingChar()) {
            return;
        }

        $crossings = $this->style->getCrossingChars();
        if (self::SEPARATOR_MID === $type) {
            [$horizontal, $leftChar, $midChar, $rightChar] = [$borders[2], $crossings[8], $crossings[0], $crossings[4]];
        } elseif (self::SEPARATOR_TOP === $type) {
            [$horizontal, $leftChar, $midChar, $rightChar] = [$borders[0], $crossings[1], $crossings[2], $crossings[3]];
        } elseif (self::SEPARATOR_TOP_BOTTOM === $type) {
            [$horizontal, $leftChar, $midChar, $rightChar] = [$borders[0], $crossings[9], $crossings[10], $crossings[11]];
        }