TimeRange
public class TimeRange : NSObject, CodableHelps get information regarding a certain period in the playback.
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                  The start time of the range. DeclarationSwift public let start: Double
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                  The end time of the range. DeclarationSwift public let end: Double
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                  Constructs a TimeRange object. DeclarationSwift public init(start: Double, end: Double)Parametersstartstart time, in seconds. endend time, in seconds. 
