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//0x20 bytes (sizeof)
struct _IOMMU_DEVICE_CREATION_CONFIGURATION
{
    struct _LIST_ENTRY NextConfiguration;                                   //0x0
    enum _IOMMU_DEVICE_CREATION_CONFIGURATION_TYPE ConfigType;              //0x10
    union
    {
        struct _IOMMU_DEVICE_CREATION_CONFIGURATION_ACPI Acpi;              //0x18
        VOID* DeviceId;                                                     //0x18
    };
};