private OplogEntryIdMap getRecoveryMap() {
    return kvMap;
  }
This map is used during recovery to keep track of what entries were recovered. Its keys are the
oplogEntryId; its values are the actual logical keys that end up in the Region's keys. It used
to be a local variable in basicInitializeOwner but now that it needs to live longer than that
method I made it an instance variable It is now only alive during recoverRegionsThatAreReady so
it could once again be passed down into each oplog.
<p>
If offlineCompaction the value in this map will have the key bytes, values bytes, user bits,
etc (any info we need to copy forward).
geode-core/src/main/java/org/apache/geode/internal/cache/Oplog.java