| Last change: | Indicate possible null values in PHPDoc @return (#1097) 
 To prevent error messages from PHPStan like:
 
 ```
 Method
 MyProject\Domain\Bot::getChatUsername()
 never returns null so it can be removed from the return typehint.
 ```
 
 when using code like this:
 ```php
 class Bot{
 
 /** @var BotManApiClient */
 private $botMan;
 
 public function getChatUsername() : ?string
 {
 return $this->botMan->getUser()->getUserName();
 }
 }
 ```
 |