src/Control/Middleware/HTTPCacheControlMiddleware.php
public function addVary($vary)
    {
        $combied = $this->combineVary($this->getVary(), $vary);
        $this->setVary($combied);
        return $this;
    }
public function addVary($vary)
    {
        $combied = $this->combineVary($this->getVary(), $vary);
        $this->setVary($combied);
        return $this;
    }
public function addVary ( $ vary ) { $ combied = $ this -> combineVary ( $ this -> getVary ( ) , $ vary ) ; $ this -> setVary ( $ combied ) ; return $ this ; }
Add a vary

@param string|array $vary
@return $this
Add a vary