<virtualType name="Magento\AsynchronousOperations\Ui\Component\DataProvider"
             type="Magento\Framework\View\Element\UiComponent\DataProvider\DataProvider"></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 Magento\AsynchronousOperations\Ui\Component\DataProvider object that it should return a Magento\Framework\View\Element\UiComponent\DataProvider\DataProvider object.

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

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

• $reporting = new BraintreeTransactionsReporting (...)