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<?php class PHPlt84 { function bar(int $a = null, array $b) {} } class PHPlt84Child extends PHPlt84 { function bar(?int $a, array $b) {} } class PHPgte71 { function bar(?int $a, array $b) {} } class PHPgte71Child extends PHPgte71 { function bar(int $a = null, array $b) {} }
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