 is a string and you want to further
    refine the pattern.</p><p><code class="mendoza-code">path</code> can also be a function that checks if a module name
    matches. If the module name matches, the function should return a
    string that will be used as the main identifier for the
    module. Most of the time, this should be the absolute path to the
    module, but it can be any unique key that identifies the module
    such as an absolute URL. It is this key that is used to determine
    if a module 