src/CacheStorage.php
private function getBodyKey($url, StreamInterface $body)
    {
        return $this->keyPrefix . md5($url) . Stream\Utils::hash($body, 'md5');
    }
private function getBodyKey($url, StreamInterface $body)
    {
        return $this->keyPrefix . md5($url) . Stream\Utils::hash($body, 'md5');
    }
private function getBodyKey ( $ url , StreamInterface $ body ) { return $ this -> keyPrefix . md5 ( $ url ) . Stream \ Utils :: hash ( $ body , 'md5' ) ; }
Create a cache key for a response's body.

@param string          $url  URL of the entry
@param StreamInterface $body Response body

@return string
Create a cache key for a response s body .