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<?php namespace Concrete\Test { use DerpFoo; class Test { public function __construct(DerpFoo $foo) {} } $f = new Test(new \Concrete\BetterFoo\BetterFoo); } namespace Concrete\Foo { class Foo {} class_alias('\Concrete\Foo\Foo', 'DerpFoo'); } namespace Concrete\BetterFoo { use \Concrete\Foo\Foo; class BetterFoo extends Foo {} }

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