AI-generated Key Takeaways
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          The IMAFriendlyObstructionPurpose enum lists the purposes for which an obstruction would be registered as friendly. 
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          Purposes include media controls, closing the ad, the obstruction not being visible, and other reasons. 
IMAFriendlyObstructionPurpose
enum IMAFriendlyObstructionPurpose : NSUInteger {}A list of purposes for which an obstruction would be registered as friendly.
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                  Undocumented DeclarationSwift case mediaControls = 0Objective-C IMAFriendlyObstructionPurposeMediaControls
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                  Undocumented DeclarationSwift case closeAd = 1Objective-C IMAFriendlyObstructionPurposeCloseAd
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                  Undocumented DeclarationSwift case notVisible = 2Objective-C IMAFriendlyObstructionPurposeNotVisible
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                  Undocumented DeclarationSwift case other = 3Objective-C IMAFriendlyObstructionPurposeOther