<virtualType name="BraintreeTransactionsCollectionFactoryForReporting"
             type="Magento\Framework\View\Element\UiComponent\DataProvider\CollectionFactory">
    <arguments>
        <argument name="collections" xsi:type="array">
            <item name="braintree_report_data_source"
                  xsi:type="string">
                Magento\Braintree\Model\Report\TransactionsCollection
            </item>
        </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 BraintreeTransactionsCollectionFactoryForReporting object that it should return a Magento\Framework\View\Element\UiComponent\DataProvider\CollectionFactory object.

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

• $collections = [...items...];

<virtualType name="BraintreeTransactionsReporting"
             type="Magento\Framework\View\Element\UiComponent\DataProvider\Reporting">
    <arguments>
        <argument name="collectionFactory" xsi:type="object">
            BraintreeTransactionsCollectionFactoryForReporting
        </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 BraintreeTransactionsReporting object that it should return a Magento\Framework\View\Element\UiComponent\DataProvider\Reporting object.

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

• $collectionFactory = new BraintreeTransactionsCollectionFactoryForReporting (...)