76             foreach ($helpers as $name => $helper) {
77                 $this->add($name, $helper);
85      * @param string   $name   helper name
91     public function add($name, $helper)  argument
94             throw new InvalidArgumentException("$name Helper is not a callable.");
96         $this->helpers[$name] = $helper;
102      * @param string $name helper name
106     public function has($name)  argument
108         return array_key_exists($name, $this->helpers);
114      * @param string $name helper name
119     public function __get($name)  argument
121         if (!$this->has($name)) {
122             throw new InvalidArgumentException('Unknown helper :' . $name);
124         return $this->helpers[$name];
130      * @param string $name helper name
135     public function __isset($name)  argument
137         return $this->has($name);
143      * @param string   $name   helper name
148     public function __set($name, $helper)  argument
150         $this->add($name, $helper);
157      * @param string $name helper name to remove
160     public function __unset($name)  argument
162         unset($this->helpers[$name]);
168      * @param string $name helper name
172     public function remove($name)  argument
174         if (!$this->has($name)) {
175             throw new InvalidArgumentException('Unknown helper: ' . $name);
177         unset($this->helpers[$name]);
231                 $name = trim($node['name'] ?? '');
232                 if ($name && substr($name, 0, 7) == 'else if') {
244                 $name = trim(isset($node['name']) ? $node['name'] : '');
245                 if ($name && substr($name, 0, 7) == 'else if') {
249                     $args = $this->parseArgs($context, substr($name, 7));
253                         $name = trim($remain['name'] ?? '');
254                         if ($name && substr($name, 0, 7) == 'else if') {