original_string: public function delete_many(array $keys) {
          if ($this->persist) {
              foreach ($keys as $key) {
                  unset($this->store[$key]);
              }
          }
          return count($keys);
      }
code: public function delete_many(array $keys) {
          if ($this->persist) {
              foreach ($keys as $key) {
                  unset($this->store[$key]);
              }
          }
          return count($keys);
      }
code_tokens: public function delete_many ( array $ keys ) { if ( $ this -> persist ) { foreach ( $ keys as $ key ) { unset ( $ this -> store [ $ key ] ) ; } } return count ( $ keys ) ; }
docstring: Deletes many items from the cache
  @param array $keys
  @return bool
docstring_tokens: Deletes many items from the cache