
    <li><code>default</code>: The default style all others are based on.</li>
    <li><code>line_number</code>: The line number margin style.</li>
    <li><code>control_char</code>: The style of control character blocks.</li>
    <li><code>indent_guide</code>: The style of indentation guides.</li>
    <li><code>call_tip</code>: The style of call tip text. Only the <code>font</code>, <code>size</code>, <code>fore</code>,
    and <code>back</code> style definition fields are supported.</li>
    <li><code>fol