<type name="Magento\Signifyd\Model\PaymentMethodMapper\PaymentMethodMapper">
    <arguments>
        <argument name="paymentMapping" xsi:type="object">
            PaymentMethodConfigData
        </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\Signifyd\Model\PaymentMethodMapper\PaymentMethodMapper object that the following arguments should be used in the foo object's constructor.

• $paymentMapping = new PaymentMethodConfigData (...)

<virtualType name="PaymentMethodConfigData"
             type="Magento\Framework\Config\Data">
    <arguments>
        <argument name="reader" xsi:type="object">
            PaymentMapperConfigReader
        </argument>
        <argument name="cacheId" xsi:type="string">
            signifyd_payment_list_cache
        </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 PaymentMethodConfigData object that it should return a Magento\Framework\Config\Data object.

This configuration tells the Object Manager that when a user wants a PaymentMethodConfigData object that the following arguments should be used in the foo object's constructor.

• $reader = new PaymentMapperConfigReader (...)
• $cacheId = "signifyd_payment_list_cache";