plot. You must supply <code>mapping</code> if there is no plot mapping.</p></td>
    </tr>
    <tr>
      <th>data</th>
      <td><p>The data to be displayed in this layer. There are three
options:</p>
<p>If <code>NULL</code>, the default, the data is inherited from the plot
data as specified in the call to <code><a href='https://ggplot2.tidyverse.org/reference/ggplot.html'>ggplot()</a></code>.</p>
<p>A <code>data.frame</code>, or other object, will override the plot
data. All objects will be fortified to p