fier">std</span><span class="special">::</span><span class="identifier">cout</span> <span class="special">&lt;&lt;</span> <span class="string">"Box:"</span>
        <span class="special">&lt;&lt;</span> <span class="string">" "</span> <span class="special">&lt;&lt;</span> <span class="identifier">bg</span><span class="special">::</span><span class="identifier">get</span><span class="special">&lt;</span><span class="identifier">bg</span><span class="special">::</span><span class="identifier">min_corner</span