Wouldn’t this be the responsibility of UIKit/AppKit teams to provide extensions 
that pass the default values?

Russ

> On Apr 8, 2016, at 10:40 AM, Erica Sadun via swift-evolution 
> <[email protected]> wrote:
> 
> Is there a best way to request default values for common Cocoa and Cocoa 
> Touch APIs? 
> Now that we're moving to Swift, the language supports defaults and omitted 
> parameters
> but the ObjC APIs do not (yet) supply them. 
> 
> For example, dismissViewControllerAnimated(flag: true, completion: nil) 
> could become dismissAnimated() when default values are available for flag and 
> completion.
> There's a large-ish class of these boilerplate defaults and it would be nice 
> if there were a way to
> be able to request them.
> 
> cc'ing in Daniel S whose idea this is.
> 
> Thanks, -- E
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