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Code Duplication    Length = 4-4 lines in 2 locations

src/Address/IPv6.php 2 locations

@@ 448-451 (lines=4) @@
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     */
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    public function toIPv4()
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    {
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        if (strpos($this->longAddress, '2002:') === 0) {
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            // 6to4
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            return IPv4::fromBytes(array_slice($this->getBytes(), 2, 4));
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        }
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        if (strpos($this->longAddress, '0000:0000:0000:0000:0000:ffff:') === 0) {
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            // IPv4-mapped IPv6 addresses
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            return IPv4::fromBytes(array_slice($this->getBytes(), -4));
@@ 452-455 (lines=4) @@
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            // 6to4
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            return IPv4::fromBytes(array_slice($this->getBytes(), 2, 4));
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        }
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        if (strpos($this->longAddress, '0000:0000:0000:0000:0000:ffff:') === 0) {
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            // IPv4-mapped IPv6 addresses
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            return IPv4::fromBytes(array_slice($this->getBytes(), -4));
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        }
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                                    457
                                    
                                    
        return null;

                                

                                                            

                                    458
                                    
                                    
    }