Survey Lift measurement info.

[Proto definition ![GitHub](https://developers.google.com/site-assets/logo-github.svg)](https://github.com/googleapis/googleapis/blob/master/google/ads/googleads/v25/resources/lift_measurement_flight.proto)

| Fields ||
|---|---|
| ## `max_survey_response_date` | `string` Output only. The latest date in which survey responses were recorded. |
| ## `min_survey_response_date` | `string` Output only. The earliest date in which survey responses were recorded. |
| ## `response_collection_ratio_micros` | `int64` Output only. The ratio of target survey responses that have been collected so far. Expressed in micros: 0 = 0%, 1000000 = 100%. |