 
 // Creation
 extension __StringStorage {
-  // TODO: Test effect of asking for exactly 62, 63, 64, 65 code units...
   @_effects(releasenone)
   private static func create(
     codeUnitCapacity capacity: Int, countAndFlags: _CountAndFlags


  @inline(__always)
  fileprivate var _capacityAndFlags: _CapacityAndFlags {
    // TODO: ...
    _CapacityAndFlags(realCapacity: _realCapacity, flags: _capacityFlags)
  }
#else

    // initialized so we can't verify e.g. ASCII-ness
    storage._invariantCheck(initialized: false)
    return storage
  }

  // The caller is expected to check UTF8 validity and ASCII-ness and update
