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

    public function getConstants()
    {
        if ($this->constants === null) {
            $this->constants = [];
            foreach ($this->reflection->getConstantReflections() as $constant) {
                $apiConstant = $this->reflectionFactory->createFromReflection($constant);
                if (!$this->isDocumented() || $apiConstant->isDocumented()) {
                    /** @var ReflectionElement $constant */
                    $this->constants[$constant->getName()] = $apiConstant;
                }
            }
        }
        return $this->constants;
    }