/**
  * Attempt to load the given plugin which is required for the current plugin
  *
  * @param string Plugin name
  * @return boolean True on success, false on failure
  */
 public function require_plugin($plugin_name)
 {
     return $this->api->load_plugin($plugin_name);
 }
 /**
  * Attempt to load the given plugin which is optional for the current plugin
  *
  * @param string Plugin name
  * @return boolean True on success, false on failure
  */
 public function include_plugin($plugin_name)
 {
     return $this->api->load_plugin($plugin_name, true, false);
 }