Ad view used to measure viewability. This property can be modified before or after starting
display ad measurement. Must be accessed on the main thread.
Starts OMID viewability measurement for display ads. Returns whether OMID viewability was
started and sets |error| if unable to start. Once started, all subsequent calls return YES and
have no effect. Must be called on the main thread.
[[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Missing the information I need","missingTheInformationINeed","thumb-down"],["Too complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-08-20 UTC."],[],["GADDisplayAdMeasurement manages viewability measurement for custom native display ad formats. It uses a `view` property, a `UIView`, to track ad visibility, which can be set before or after starting measurement. The `startWithError:` method initiates OMID viewability measurement. This method returns `YES` if successful and subsequent calls have no effect; an error is provided if it fails. These actions must be executed on the main thread.\n"]]