public Page copy(long version){
  Page newPage=create(map,version,keys,values,children,totalCount,getMemory());
  removePage();
  newPage.cachedCompare=cachedCompare;
  return newPage;
}

public Page copy ( long version ) { Page newPage = create ( map , version , keys , values , children , totalCount , getMemory ( ) ) ; removePage ( ) ; newPage . cachedCompare = cachedCompare ; return newPage ; }
create a copy of this page .
