Re: [touch-events] TouchEvent constructor is very unusual since it converts one type of object (sequence) to another type (TouchList)

Hmm, 
[`ServiceWorkerMessageEvent`](https://slightlyoff.github.io/ServiceWorker/spec/service_worker/#serviceworkermessage-event-interface)
 is another interesting example.  It takes a `sequence` on input and 
uses an array type on output.  Presumably there's some story about 
[WebIDL array types](http://www.w3.org/TR/WebIDL/#idl-array) being 
replaced by 
[`FrozenArray<T>`](https://heycam.github.io/webidl/#idl-frozen-array)?

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Received on Tuesday, 22 December 2015 22:26:10 UTC