See this code <?php echo "example"; ?> end of example

Example 2:

<virtualType name="Catalog\PillarType\Model\Specification\Item\ProductType" type="Catalog\PillarType\Model\Specification\Item">
<arguments>
<argument name="label" xsi:type="string">Product Type</argument>
<argument name="valueGetter" xsi:type="object">Catalog\PillarType\Model\Specification\ValueGetter\ProductType</argument>
</arguments>
</virtualType>