original_string: public function set($key, $value)
      {
          return $this->memcache->set($key, $value, 0, $this->lifetime);
      }
code: public function set($key, $value)
      {
          return $this->memcache->set($key, $value, 0, $this->lifetime);
      }
code_tokens: public function set ( $ key , $ value ) { return $ this -> memcache -> set ( $ key , $ value , 0 , $ this -> lifetime ) ; }
docstring: adds a cache key for a specific lifetime into the cache
  
  @param string $key
  @param mixed  $value
  
  @return bool
docstring_tokens: adds a cache key for a specific lifetime into the cache