quartile
The array of time offsets (relative to the beginning of the ad, in seconds) of the quartile tracking events (0: FIRST_QUARTILE, 1: MID_POINT, 2: THIRD_QUARTILE, 3: COMPLETE).
The array of time offsets (relative to the beginning of the ad, in seconds) of the quartile tracking events (0: FIRST_QUARTILE, 1: MID_POINT, 2: THIRD_QUARTILE, 3: COMPLETE).