| Func _SmallString.computeIsASCII() has been removed |
| Func _SmallString.withMutableCapacity(_:) has been removed |
| Struct _StringObject.Discriminator has been removed |
| Var _SmallString.discriminator has been removed |
| Var _StringObject.CountAndFlags._storage has declared type change from UInt to UInt64 |
| Var _StringObject.CountAndFlags.countMask has declared type change from UInt to UInt64 |
| Var _StringObject.CountAndFlags.countMask is now static |
| Var _StringObject.CountAndFlags.flagsMask has declared type change from UInt to UInt64 |
| Var _StringObject.CountAndFlags.flagsMask is now static |
| Var _StringObject.Nibbles.discriminatorShift has been removed |
| Var _StringObject.discriminator has been removed |
| Var _StringObject.objectRawBits has been renamed to Var _StringObject.discriminatedObjectRawBits |
| Var _StringObject.undiscriminatedObjectRawBits has been removed |
| |
| Constructor _StringObject.CountAndFlags.init(count:) has been removed |
| Constructor _StringObject.CountAndFlags.init(count:isASCII:) has been removed |
| Func _StringObject.Nibbles.largeSharedMortal() has been removed |
| Var _StringGuts.hasNativeStorage has been removed |
| Var _StringGuts.isNFC has been removed |
| Var _StringGuts.isNFCFastUTF8 has been removed |
| Var _StringObject.hasNativeStorage has been removed |
| Var _StringObject.isNFC has been removed |
| Var _StringObject.largeFastIsNative has been removed |
| |
| Var _StringObject.largeFastIsShared has been removed |
| Var _StringObject.largeIsCocoa has been removed |
| Var _StringObject.objCBridgeableObject has been removed |
| |
| Var _StringObject._countAndFlags is no longer a stored property |
| Var _StringObject._countAndFlagsBits is added to a non-resilient type |
