GMSNavigationDelayCategory
enum GMSNavigationDelayCategory : NSInteger {}A GMSNavigationDelayCategory is a category that represents the delay category of a route or a
a path.
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                  No traffic data is provided. DeclarationSwift case noData = 0Objective-C GMSNavigationDelayCategoryNoData = 0
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                  No traffic data is provided. DeclarationSwift case heavy = 1Objective-C GMSNavigationDelayCategoryHeavy = 1
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                  No traffic data is provided. DeclarationSwift case medium = 2Objective-C GMSNavigationDelayCategoryMedium = 2
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                  No traffic data is provided. DeclarationSwift case light = 3Objective-C GMSNavigationDelayCategoryLight = 3