$arr = ['content' => $content];
Core\Hook::callAll($this->module . '_mod_content', $arr);
$content = $arr['content'];
$arr = ['content' => call_user_func([$this->module_class, 'content'])];
Core\Hook::callAll($this->module . '_mod_aftercontent', $arr);
$content .= $arr['content'];
$arr = ['content' => $content];
Core\Hook::callAll($this->module . '_mod_content', $arr);
$content = $arr['content'];
$arr = ['content' => call_user_func([$this->module_class, 'content'])];
Core\Hook::callAll($this->module . '_mod_aftercontent', $arr);
$content .= $arr['content'];