   header_options
    =
  </dt>
  <dd>
    <pre><code class='coffeescript'>undefined</code></pre>
    <div class='docstring'>
  <p>[<a href='../../class/c3/Selection.Options.html'>c3.Selection.Options</a>] Options for the table <code>th</code> headers.  Callbacks are called with two arguments:
The first is the column object and the second is the column index.</p>
</div>
<div class='tags'>
</div>
  </dd>
  <dt id='footer_options-variable'>
    footer_options
    =
  </dt>
  <dd>
    <pre><code class='coffees