original_string: public final function get($key)
      {
          if (isset($this->_map[$key])) {
  
              return $this->_map[$key];
          }
  
          return null;
      }
code: public final function get($key)
      {
          if (isset($this->_map[$key])) {
  
              return $this->_map[$key];
          }
  
          return null;
      }
code_tokens: public final function get ( $ key ) { if ( isset ( $ this -> _map [ $ key ] ) ) { return $ this -> _map [ $ key ] ; } return null ; }
docstring: Returns the value to which this map maps the specified key.
  
  Returns null if the map contains no mapping for this key. A return value of null
  does not necessarily indicate that the map contains no mapping for the key; it's
  also possible that the map explicitly maps the key to null. The containsKey
  operation may be used to distinguish these two cases.
  
  @param string $key Key whose associated value is to be returned.
  
  @return mixed The value to which this map maps the specified key, or null if the
  map contains no mapping for this key.
docstring_tokens: Returns the value to which this map maps the specified key .