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<div class="type-signature"><span class="modifiers">public interface </span><span class="element-name type-name-label">Extension</span></div>
<div class="block"><p>
 Service interface implemented by extensions. An extension is a service provider declared in <code>META-INF/services</code>.
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 Service providers may have <a href="../../event/Observes.html" title="annotation interface in jakarta.enterprise.event">observer methods</a>, which may o