anchor.diff:  
   The API supports.
   
  -- 64-bit sizes
  +- 63-bit sizes
   - UTF-8 and ISO-8859-1 encoded strings.
   - thread safe off heap memory operations.
   - deterministic release of resources via reference counting.
  
positive.code: ----
  Bytes<ByteBuffer> bytes = Bytes.elasticByteBuffer(64);
  ByteBuffer bb = bytes.underlyingObject();
  ----
  
  .Bytes which wraps some native memory
  
negative.code: ----
  Bytes bytes = Bytes.allocateElasticDirect(64);
  long address = bytes.address
  
  bytes.releaseLast(); // when it can be freed.
  ----
  
  