test/multifile/Inputs/requirement-signature.swift - third_party/swift - Git at Google

 protocol ObservableType {
   func subscribe<O>(_: O)
 }

 protocol ConnectableObservableType : ObservableType {
   func connect()
 }
	protocol ObservableType {
	func subscribe<O>(_: O)
	}

	protocol ConnectableObservableType : ObservableType {
	func connect()
	}