<?php
require_once __DIR__ . '/vendor/autoload.php';

use Doctrine\Common\Annotations\AnnotationReader;
use Symfony\Component\Serializer\Annotation\Ignore;
use Symfony\Component\Serializer\Mapping\Factory\ClassMetadataFactory;
use Symfony\Component\Serializer\Mapping\Loader\AnnotationLoader;
use Symfony\Component\Serializer\Normalizer\ObjectNormalizer;
use Symfony\Component\Serializer\Serializer;

class Person
{
    private $name;

    public function setName($name)
    {
        $this->name = $name;
    }

    public function getName()
    {
        return $this->name;
    }

    /**
     * @Ignore()
     */
    public function getLowerCaseName()
    {
        return strtolower($this->name);
    }

    public function getNameWithPrefix($prefix)
    {
        return sprintf('%s %s', $prefix, $this->name);
    }
}

$data = [
    'name' => 'Person name',
];

$metaFactory = new ClassMetadataFactory(new AnnotationLoader(new AnnotationReader()));
$serializer = new Serializer([new ObjectNormalizer($metaFactory)]);

$person = $serializer->denormalize($data, Person::class);

$personData = $serializer->normalize($person);
var_dump($personData);

Fatal error: Uncaught Symfony\Component\PropertyAccess\Exception\NoSuchPropertyException: Can't get a way to read the property "nameWithPrefix" in class "Person". in /home/project/test/my_project/vendor/symfony/property-access/PropertyAccessor.php:449
Stack trace:
#0 /home/project/test/my_project/vendor/symfony/property-access/PropertyAccessor.php(115): Symfony\Component\PropertyAccess\PropertyAccessor->readProperty(Array, 'nameWithPrefix', false)
#1 /home/project/test/my_project/vendor/symfony/serializer/Normalizer/ObjectNormalizer.php(140): Symfony\Component\PropertyAccess\PropertyAccessor->getValue(Object(Person), 'nameWithPrefix')
#2 /home/project/test/my_project/vendor/symfony/serializer/Normalizer/AbstractObjectNormalizer.php(183): Symfony\Component\Serializer\Normalizer\ObjectNormalizer->getAttributeValue(Object(Person), 'nameWithPrefix', NULL, Array)
#3 /home/project/test/my_project/vendor/symfony/serializer/Serializer.php(161): Symfony\Component\Serializer\Normalizer\AbstractObjectNormalizer->normalize(Object(Person), NULL, Array)
#4 /home/project/test/my_project/rep.php(47): Symfony\Component\Serializer\Serializer->normalize(Object(Person))