Method parameterImplementsEventInterface

/**
 * Checks if parameter is typehinted to accept \Joomla\Event\EventInterface.
 *
 * @param   \ReflectionParameter  $parameter
 *
 * @return  boolean
 *
 * @since   4.0.0
 */
private function parameterImplementsEventInterface(\ReflectionParameter $parameter) : bool
{
    $reflectionType = $parameter->getType();
    // Parameter is not typehinted.
    if ($reflectionType === null) {
        return false;
    }
    // Parameter is nullable.
    if ($reflectionType->allowsNull()) {
        return false;
    }
    // Handle standard typehints.
    if ($reflectionType instanceof \ReflectionNamedType) {
        return \is_a($reflectionType->getName(), EventInterface::class, true);
    }
    // Handle PHP 8 union types.
    if ($reflectionType instanceof \ReflectionUnionType) {
        foreach ($reflectionType->getTypes() as $type) {
            if (!\is_a($type->getName(), EventInterface::class, true)) {
                return false;
            }
        }
        return true;
    }
    return false;
}