test/Serialization/Inputs/private_import_other.swift - third_party/swift - Git at Google

 private struct Base {
   private func bar() {}
 }

 struct Value {
 }

 extension Value {
   fileprivate func foo() {}
 }
	private struct Base {
	private func bar() {}
	}

	struct Value {
	}

	extension Value {
	fileprivate func foo() {}
	}