PHPStan\Reflection\Php\PhpClassReflectionExtension::getMethodParameterAnnotationTypeString PHP Method

    private function getMethodParameterAnnotationTypeString(array $phpDocParams, \ReflectionParameter $parameterReflection)
    {
        if (!isset($phpDocParams[$parameterReflection->getName()])) {
            return null;
        }
        $typeStrings = $phpDocParams[$parameterReflection->getName()];
        if (count($typeStrings) > 1) {
            return null;
        }
        return $typeStrings[0];
    }