Merge pull request #479 from ably/reuse-RTLM14-md

Defer to `RTLM14` check in `RTLM5d2`

Author: sacOO7

specifications/objects-features.md

@@ -483,14 +483,15 @@ Objects feature enables clients to store shared data as "objects" on a channel.
   - `(RTLM5d)` Returns the value from the current `data` at the specified key, as follows:
     - `(RTLM5d1)` If no `ObjectsMapEntry` exists at the key, return undefined/null
     - `(RTLM5d2)` If an `ObjectsMapEntry` exists at the key:
-      - `(RTLM5d2a)` If `ObjectsMapEntry.tombstone` is `true`, return undefined/null
+      - `(RTLM5d2h)` If the `ObjectsMapEntry` is tombstoned (per [RTLM14](#RTLM14)), return undefined/null
+      - `(RTLM5d2a)` This clause has been replaced by [RTLM5d2h](#RTLM5d2h)
       - `(RTLM5d2b)` If `ObjectsMapEntry.data.boolean` exists, return it
       - `(RTLM5d2c)` If `ObjectsMapEntry.data.bytes` exists, return it
       - `(RTLM5d2d)` If `ObjectsMapEntry.data.number` exists, return it
       - `(RTLM5d2e)` If `ObjectsMapEntry.data.string` exists, return it
       - `(RTLM5d2f)` If `ObjectsMapEntry.data.objectId` exists, get the object stored at that `objectId` from the internal `ObjectsPool`:
         - `(RTLM5d2f1)` If an object with id `objectId` does not exist, return undefined/null
-        - `(RTLM5d2f3)` If an object with id `objectId` exists and its `LiveObject.isTombstone` is `true`, return undefined/null
+        - `(RTLM5d2f3)` This clause has been replaced by [RTLM5d2h](#RTLM5d2h)
         - `(RTLM5d2f2)` Otherwise, return the object with id `objectId`
       - `(RTLM5d2g)` Otherwise, return undefined/null
 - `(RTLM10)` `LiveMap#size`: