Joli\Jane\Guesser\JsonSchema\AdditionalPropertiesGuesser::guessType PHP Method

    public function guessType($object, $name, $classes)
    {
        if ($object->getAdditionalProperties() === true) {
            return new MapType($object, new Type($object, 'mixed'));
        }
        return new MapType($object, $this->chainGuesser->guessType($object->getAdditionalProperties(), $name, $classes));
    }