lass=keyword>using </span><span class=keyword>namespace </span><span class=identifier>boost</span><span class=special>;</span>
<span class=keyword>using </span><span class=keyword>namespace </span><span class=identifier>boost</span><span class=special>::</span><span class=identifier>multi_index</span><span class=special>;</span>
<span class=keyword>namespace </span><span class=identifier>ba </span><span class=special>=  </span><span class=identifier>boost</span><span class=special>::</span><span class=ident