Code Duplication    Length = 5-5 lines in 3 locations

src/PhpSpreadsheet/Writer/Html.php 3 locations

@@ 439-443 (lines=5) @@
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        // Fetch sheets
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        $sheets = [];
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        if (is_null($this->sheetIndex)) {
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            $sheets = $this->spreadsheet->getAllSheets();
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        } else {
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            $sheets[] = $this->spreadsheet->getSheet($this->sheetIndex);
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        }
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        // Construct HTML
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        $html = '';
@@ 554-558 (lines=5) @@
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        // Fetch sheets
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        $sheets = [];
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        if (is_null($this->sheetIndex)) {
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            $sheets = $this->spreadsheet->getAllSheets();
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        } else {
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            $sheets[] = $this->spreadsheet->getSheet($this->sheetIndex);
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        }
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        // Construct HTML
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        $html = '';
@@ 888-892 (lines=5) @@
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        // Fetch sheets
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        $sheets = [];
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        if (is_null($this->sheetIndex)) {
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            $sheets = $this->spreadsheet->getAllSheets();
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        } else {
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            $sheets[] = $this->spreadsheet->getSheet($this->sheetIndex);
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        }
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        // Build styles per sheet
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        foreach ($sheets as $sheet) {