Guava clone

clone.php

$subscriberClass = new \ReflectionClass(TestSubscriber::class);
$annotationReader = new AnnotationReader();

$mappings = [];

// Registry
foreach ($subscriberClass->getMethods(\ReflectionMethod::IS_PUBLIC) as $method) {
    $annotation = $annotationReader->getMethodAnnotation($method, Subscribe::class);
    $parameters = $method->getParameters();
    if (!$annotation || empty($parameters)) {
        continue;
    }

    $eventClass = $parameters[0]->getClass()->getName();
    if (!isset($mappings[$eventClass])) {
        $mappings[$eventClass] = [];
    }

    $mappings[$eventClass][] = $method;
}

// Fire
foreach ($mappings as $eventClass => $methods) {
    /** @var \ReflectionMethod $method */
    foreach ($methods as $method) {
        $declaringClass = $method->getDeclaringClass()->getName();
        $method->invoke(new $declaringClass, new $eventClass);
    }
}