private RawByteAllocator findRawByteAllocator(String key){
  RawByteAllocator alloc=rawByteAllocatorCache.get(key);
  if (alloc == null) {
    throw new RuntimeException("Non-existence vector: key=" + key);
  }
  return alloc;
}

private RawByteAllocator findRawByteAllocator ( String key ) { RawByteAllocator alloc = rawByteAllocatorCache . get ( key ) ; if ( alloc == null ) { throw new RuntimeException ( "Non-existence vector: key=" + key ) ; } return alloc ; }
finds an existing rawbyteallocator or throws an exception .
