ApiGen\Parser\Reflection\ReflectionClass::getOwnConstant PHP Method

    public function getOwnConstant($name)
    {
        if (isset($this->getOwnConstants()[$name])) {
            return $this->getOwnConstants()[$name];
        }
        throw new InvalidArgumentException(sprintf('Constant %s does not exist in class %s', $name, $this->reflection->getName()));
    }