updated plugin WP-WebAuthn
version 1.3.4
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@ -30,7 +30,7 @@ class InputStream implements \IteratorAggregate
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/**
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* Sets a callback that is called when the write buffer becomes empty.
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*/
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public function onEmpty(callable $onEmpty = null)
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public function onEmpty(?callable $onEmpty = null)
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{
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$this->onEmpty = $onEmpty;
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}
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