markdown="1">intrinsic complexity</a></span>:
we can move it around,
but we can&rsquo;t get rid of it.</p>
<p>The other difference between our visitor and <code>acorn-walk</code> is that
our class uses <span class="ix-entry" ix-key="dynamic lookup" markdown="1"><a class="gl-ref" href="../glossary/#dynamic_lookup" markdown="1">dynamic lookup</a></span>
(a form of <span class="ix-entry" ix-key="introspection!of methods" markdown="1">introspection</span>)
to look up a method
with the same name as the node type