protected function _addWpHook($name, callable $handler, $priority = null, $numArgs = 1)
    {
        $name = $this->_normalizeString($name);

        $priority = ($priority === null)
            ? $this->_getWpHookDefaultPriority()
            : $this->_normalizeInt($priority);

        $numArgs = ($numArgs === null)
            ? 1
            : $this->_normalizeInt($numArgs);

        \add_filter($name, $handler, $priority, $numArgs);
    }