JMSSerializerBundle/Tests/Metadata/Driver/xml/ObjectWithVirtualProperties.xml

<?xml version="1.0" encoding="UTF-8"?>
<serializer>
    <class name="JMS\SerializerBundle\Tests\Fixtures\ObjectWithVirtualProperties">
        <property name="existField" type="string"/>
        <virtual-property method="getVirtualValue"/>
        <virtual-property method="getVirtualSerializedValue" serialized-name="test"/>
    </class>
</serializer>