ApiGen\Parser\Broker\Backend::addClass PHP Method

    private function addClass($name)
    {
        $name = ltrim($name, '\\');
        if (!isset($this->declared[$name]) || $this->isClassLoaded($name)) {
            return false;
        }
        $parameterClass = $this->getBroker()->getClass($name);
        if ($parameterClass->isInternal()) {
            $this->allClasses[self::INTERNAL_CLASSES][$name] = $parameterClass;
            $parentClasses = array_merge($parameterClass->getInterfaces(), $parameterClass->getParentClasses());
            foreach ($parentClasses as $parentClass) {
                if (!isset($this->allClasses[self::INTERNAL_CLASSES][$parentName = $parentClass->getName()])) {
                    $this->allClasses[self::INTERNAL_CLASSES][$parentName] = $parentClass;
                }
            }
        } elseif (!$parameterClass->isTokenized()) {
            if (!isset($this->allClasses[self::NONEXISTENT_CLASSES][$name])) {
                $this->allClasses[self::NONEXISTENT_CLASSES][$name] = $parameterClass;
            }
        }
    }