typedef void (*VRTUSdkInitializedCallback)();
typedef void (*VRTUSdkInitializationFailedWithErrorCallback)(const char *error);
typedef void (*VRTUCallback)(int zoneId);
typedef void (*VRTUErrorCallback)(int zoneId, const char *error);

typedef enum {
    VRTBannerPositionTop,
    VRTBannerPositionBottom,
    VRTBannerPositionManual
} VRTBannerPosition;
