Open Radar

 
Summary:
It would be nice if instead of having to specify `private` or `internal` for every property in Swift I could lump them into a block.

For example,

class Foo {
  // public by default
  var repeatCount = 3
  private {
    let maxRepeatCount = 100
    var secretMessage = "you can't change this"
  }

 ...
}

Instead of having to write,

class Foo {
  // public by default
  var repeatCount = 3
  private let maxRepeatCount = 100
  private var secretMessage = "you can't change this"
 ...
}

Steps to Reproduce:
1. Create any Swift class/struct.
2. Create some private properties
3. Notice each one has to begin with `private`

Expected Results:
I could lump all `private` properties into a block of some kind 

Actual Results:
I have to type `private` before each property