ode></td><td>$dest = current closure (self)</td></tr><tr><td><code class="mendoza-code">ldt</code></td><td><code class="mendoza-code">(ldt dest)</code></td><td>$dest = true</td></tr><tr><td><code class="mendoza-code">ldu</code></td><td><code class="mendoza-code">(ldu dest env index)</code></td><td>$dest = envs[env][index]</td></tr><tr><td><code class="mendoza-code">len</code></td><td><code class="mendoza-code">(len dest ds)</code></td><td>$dest = length(ds)</td></tr><tr><td><code class="mendoza-code">lt</co