title: Stop Xcode automatically generating Swift interfaces for Objective-C headers
body: <p>Is it possible to stop Xcode (8) from automatically generating a Swift interface when showing an Objective-C header? For example by setting a user defaults value.</p>
  
  <p>In theory it’s a really nice feature of Xcode. Unfortunately it doesn’t work reliably. For me it even seem to fail most of the time. As I haven’t been able to discern why it happens, I’d like to opt out of it, until the bugs Xcode/SourceKit have been resolved.</p>