private void decrementCopyFieldTargetCount(SchemaField dest){
  Integer count=copyFieldTargetCounts.get(dest);
  assert count != null;
  if (count <= 1) {
    copyFieldTargetCounts.remove(dest);
  }
 else {
    copyFieldTargetCounts.put(dest,count - 1);
  }
}

private void decrementCopyFieldTargetCount ( SchemaField dest ) { Integer count = copyFieldTargetCounts . get ( dest ) ; assert count != null ; if ( count <= 1 ) { copyFieldTargetCounts . remove ( dest ) ; } else { copyFieldTargetCounts . put ( dest , count - 1 ) ; } }
decrements the count for the given destination field in copyfieldtargetcounts .
