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@@ -17,7 +17,7 @@ use Symfony\Component\Console\Output\OutputInterface;
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use Symfony\Component\Console\Helper\HelperSet;
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use Symfony\Component\Console\Helper\HelperSet;
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use Composer\Config;
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use Composer\Config;
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-class BaseIO implements IOInterface
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+abstract class BaseIO implements IOInterface
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{
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{
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protected $authentications = array();
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protected $authentications = array();
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