original_string: public function getValue($key)
      {
          if (!isset($this->values[$key])) {
              return null;
          }
          return $this->values[$key];
      }
code: public function getValue($key)
      {
          if (!isset($this->values[$key])) {
              return null;
          }
          return $this->values[$key];
      }
code_tokens: public function getValue ( $ key ) { if ( ! isset ( $ this -> values [ $ key ] ) ) { return null ; } return $ this -> values [ $ key ] ; }
docstring: Return a value, if it exists.
  
  @param string $key
  
  @return mixed
docstring_tokens: Return a value if it exists .