lex:embed</code></a><code>(child, ...)</code> and <code>parent:embed(lex, ...)</code>,
    respectively.</li>
    <li>Define fold points with simple calls to
    <a href="#lexer.add_fold_point"><code>lex:add_fold_point()</code></a>. No need to mess with Lua
    patterns anymore.</li>
    <li>Any legacy lexer options such as <code>M._FOLDBYINDENTATION</code>, <code>M._LEXBYLINE</code>,
    <code>M._lexer</code>, etc. should be added as table options to <a href="#lexer.new"><code>lexer.new()</code></a>.</li>
