private Iterable<Map.Entry<String,String>> combinedCommitData(Iterable<Map.Entry<String,String>> commitData){
  Map<String,String> m=new HashMap<>();
  if (commitData != null) {
    for (    Map.Entry<String,String> ent : commitData) {
      m.put(ent.getKey(),ent.getValue());
    }
  }
  m.put(INDEX_EPOCH,Long.toString(indexEpoch,16));
  return m.entrySet();
}

private Iterable < Map . Entry < String , String > > combinedCommitData ( Iterable < Map . Entry < String , String > > commitData ) { Map < String , String > m = new HashMap < > ( ) ; if ( commitData != null ) { for ( Map . Entry < String , String > ent : commitData ) { m . put ( ent . getKey ( ) , ent . getValue ( ) ) ; } } m . put ( INDEX_EPOCH , Long . toString ( indexEpoch , 16 ) ) ; return m . entrySet ( ) ; }
combine original user data with the taxonomy epoch .
