«Each getter must have description with @return annotation. See Magento\Tax\Api\Data\TaxDetailsInterface::getSubtotal()»

[dmitrii-fediuk]

Is it a bug?
http://magento.stackexchange.com/questions/90647
https://mage2.pro/t/topic/240/3

[davidalger]

Closing as duplicate of #2555 since that one contains complete stack-trace information on issue.

[shwetabha]

In magento2, Take care of commenting in interface page. If you just add function without comment param type. It will return error. Example - interface AuthInterface {
/**

• Test function
• @api
• @param $param string
• @return string
  */
  public function test(); } You have to add the return type in comment section