protected boolean checkEntryNotValid(RegionEntry mapEntry){
  return (mapEntry == null || (mapEntry.isRemoved() && !mapEntry.isTombstone()));
}

protected boolean checkEntryNotValid ( RegionEntry mapEntry ) { return ( mapEntry == null || ( mapEntry . isRemoved ( ) && ! mapEntry . isTombstone ( ) ) ) ; }
checks if the entry is a valid entry
