AI-generated Key Takeaways
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          GMSNavigationTimeAndDistanceis an immutable object providing route information.
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          It includes the estimated travel time ( durationSeconds) in seconds.
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          It also includes the total travel distance ( distanceMeters) in meters.
GMSNavigationTimeAndDistance
@interface GMSNavigationTimeAndDistance : NSObjectAn immutable class that encapsulates the distance remaining and the ETA for a route.
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                  The duration for this route, in seconds. DeclarationSwift var durationSeconds: TimeInterval { get }Objective-C @property (nonatomic, readonly) NSTimeInterval durationSeconds;
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                  The travel distance of this route, in meters. DeclarationSwift var distanceMeters: CLLocationDistance { get }Objective-C @property (nonatomic, readonly) CLLocationDistance distanceMeters;