turns a reference to itself.
          </p>
<h6>
<a name="boost_asio.reference.basic_socket.lowest_layer.overload2.h0"></a>
            <span class="phrase"><a name="boost_asio.reference.basic_socket.lowest_layer.overload2.return_value"></a></span><a class="link" href="overload2.html#boost_asio.reference.basic_socket.lowest_layer.overload2.return_value">Return
            Value</a>
          </h6>
<p>
            A const reference to the lowest layer in the stack of layers. Ownership
            is not tran