code: protected long getLong()
    {
      if (tc.isEntryEnabled()) Tr.entry(tc, "getLong",this);
  
      long data = _buffer.getLong();
  
      if (tc.isEntryEnabled()) Tr.exit(tc, "getLong", new Long(data));
      return data;
    }
docs: Getter method used to a long from the mapped byte buffer at the current
  byte cursor position. The byte cursor is advanced by the size of a long.
  
  @return The long value read from the mapped byte buffer.