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Code Duplication    Length = 3-3 lines in 2 locations

src/PhpSpreadsheet/Calculation/LookupRef.php 2 locations

@@ 725-727 (lines=3) @@
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        }
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        $f = array_keys($lookup_array);
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        $firstRow = array_pop($f);
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        if ((!is_array($lookup_array[$firstRow])) || ($index_number > count($lookup_array[$firstRow]))) {
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            return Functions::REF();
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        }
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        $columnKeys = array_keys($lookup_array[$firstRow]);
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        $returnColumn = $columnKeys[--$index_number];
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        $firstColumn = array_shift($columnKeys);
@@ 794-796 (lines=3) @@
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        }
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        $f = array_keys($lookup_array);
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        $firstRow = array_pop($f);
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        if ((!is_array($lookup_array[$firstRow])) || ($index_number - 1 > count($lookup_array[$firstRow]))) {
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            return Functions::REF();
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        }
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        $columnKeys = array_keys($lookup_array[$firstRow]);
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        $firstkey = $f[0] - 1;
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        $returnColumn = $firstkey + $index_number;