PHPStan\Reflection\Php\PhpMethodReflection::isVariadic PHP Method

    public function isVariadic() : bool
    {
        $isNativelyVariadic = $this->reflection->isVariadic();
        if (!$isNativelyVariadic && $this->declaringClass->getName() === 'ReflectionMethod' && $this->reflection->getName() === 'invoke') {
            return true;
        }
        if (!$isNativelyVariadic && $this->declaringClass->getNativeReflection()->getFileName() !== false) {
            $key = sprintf('variadic-method-%s-%s', $this->declaringClass->getName(), $this->reflection->getName());
            $cachedResult = $this->cache->load($key);
            if ($cachedResult === null) {
                $nodes = $this->parser->parseFile($this->declaringClass->getNativeReflection()->getFileName());
                $result = $this->callsFuncGetArgs($nodes);
                $this->cache->save($key, $result);
                return $result;
            }
            return $cachedResult;
        }
        return $isNativelyVariadic;
    }