this (null, address, (int) len, (int) len, 0, false);
super(capacity, capacity, 0, -1); this.owner = this; this.address = VMDirectByteBuffer.allocate(capacity);
  public DirectByteBufferImpl (RawData address, long len)  {    this (null, address, (int) len, (int) len, 0, false);  }