an asynchronous read. The buffer into which the data will be read must
be valid for the lifetime of the asynchronous operation.
typename ReadHandler = DEFAULT>
const MutableBufferSequence & buffers,
ReadHandler && handler = DEFAULT);
Distributed under the Boost Software License, Version 1.0. (See accompanying
file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)