ss="phrase"><a name="boost_asio.reference.dynamic_vector_buffer.prepare.return_value"></a></span><a class="link" href="prepare.html#boost_asio.reference.dynamic_vector_buffer.prepare.return_value">Return
          Value</a>
        </h6>
<p>
          An object of type <code class="computeroutput">mutable_buffers_type</code> that satisfies MutableBufferSequence
          requirements, representing basic_string memory at the start of the output
          sequence of size <code class="computeroutput">n</code>