derlying the content html.
The bars may be styled using _vis<em>options.styles</em>.</li>
</ul>
</li>
<li><strong>total_value</strong> [Number, Function] - Some visualizations, such as <em>bar</em>, show their values relative to some total value.  This number or callback provides for that value. If not set, the default is to use the sum of values for all the cells in the column.</li>
<li><strong>vis_options</strong> [<a href='../../class/c3/Selection.Options.html'>c3.Selection.Options</a>] Options that may 