<virtualType name="Amazon\Payment\Gateway\ErrorMapper\VirtualMappingData"
             type="Magento\Payment\Gateway\ErrorMapper\MappingData">
    <arguments>
        <argument name="reader" xsi:type="object">
            Amazon\Payment\Gateway\ErrorMapper\VirtualConfigReader
        </argument>
        <argument name="cacheId" xsi:type="string">
            amazon_error_mapper
        </argument>
    </arguments>
</virtualType>

This is a virtual type configuration.

This configuration is for the base area. Base area configurations will apply to all the sub-applications.

This virtualType configuration tells the Object Manager when a user wants a virtual Amazon\Payment\Gateway\ErrorMapper\VirtualMappingData object that it should return a Magento\Payment\Gateway\ErrorMapper\MappingData object.

This configuration tells the Object Manager that when a user wants a Amazon\Payment\Gateway\ErrorMapper\VirtualMappingData object that the following arguments should be used in the foo object's constructor.

• $reader = new Amazon\Payment\Gateway\ErrorMapper\VirtualConfigReader (...)
• $cacheId = "amazon_error_mapper";

<type name="Magento\Payment\Gateway\ErrorMapper\MappingData">
    <arguments>
        <argument name="reader" xsi:type="object">
            Magento\Payment\Gateway\ErrorMapper\VirtualConfigReader
        </argument>
        <argument name="cacheId" xsi:type="string">
            payment_error_mapper
        </argument>
    </arguments>
</type>

This is a type configuration.

This configuration is for the base area. Base area configurations will apply to all the sub-applications.

This configuration tells the Object Manager that when a user wants a Magento\Payment\Gateway\ErrorMapper\MappingData object that the following arguments should be used in the foo object's constructor.

• $reader = new Magento\Payment\Gateway\ErrorMapper\VirtualConfigReader (...)
• $cacheId = "payment_error_mapper";