Code Duplication    Length = 4-4 lines in 2 locations

src/Eccube/Service/PurchaseFlow/Processor/StockDiffProcessor.php 2 locations

@@ 103-106 (lines=4) @@
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                // 2 -> 1 = -1
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                $diff[$id] = $ToItems[$id] - $FromItems[$id];
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            } // 削除された明細
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            elseif (isset($FromItems[$id]) && empty($ToItems[$id])) {
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                // 2 -> 0 = -2
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                $diff[$id] = $FromItems[$id] * -1;
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            } // 追加された明細
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            elseif (!isset($FromItems[$id]) && isset($ToItems[$id])) {
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                // 0 -> 2 = +2
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                $diff[$id] = $ToItems[$id];
@@ 107-110 (lines=4) @@
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                // 2 -> 0 = -2
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                $diff[$id] = $FromItems[$id] * -1;
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            } // 追加された明細
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            elseif (!isset($FromItems[$id]) && isset($ToItems[$id])) {
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                // 0 -> 2 = +2
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                $diff[$id] = $ToItems[$id];
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            }
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        }
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        return $diff;