function findControllerForView ($viewName)
  {
    /** @var DocumentContext $this */
    $path = $this->viewService->resolveTemplatePath ($viewName, $base);
//    inspect ($viewName, $base, $path);
    if (isset($this->controllers[$path]))
      return $this->controllers[$path];

    foreach ($this->controllerNamespaces as $nsPath => $ns) {
//      inspect ($nsPath, $ns);
      if (str_beginsWith ($path, $nsPath)) {
        $remaining = substr ($path, strlen ($nsPath) + 1);
        $a         = PS ($remaining)->split ('/');
        $file      = $a->pop ();
        $nsPrefix  = $a->map ('ucfirst', false)->join ('\\')->S;
        $class     = ($p = strpos ($file, '.')) !== false
          ? ucfirst (substr ($file, 0, $p))
          : ucfirst ($file);
        $FQN       = PA ([$ns, $nsPrefix, $class])->prune ()->join ('\\')->S;
//        inspect ("CLASS $FQN");
        if (class_exists ($FQN))
          return $FQN;
      }
    }
//    inspect ("CLASS NOT FOUND FOR VIEW $viewName");
    return null;
  }