IdentityObject and InlineObject

[Brian Goetz]

>
> Secondarily:
>
>  - If we take this step, is `IdentityObject` still the best name?
>
>

Possible candidates:

  - Identity, as in "class Foo implements Identity".  This says what it 
means, though it is quite possible that it will clash with existing 
types.  (This is not an absolute disqualifier, but it is a consideration.)
  - IdentityObject.  This is where we are now; it always felt a little 
clunky to me.
  - ObjectIdentity ("class Foo implements ObjectIdentity").  Better than 
IdentityObject, less likely to clash than Identity.
  - WithIdentity.  Not the best name, but less likely than Identity to 
clash.

Others?