public function __call($name, $args) {
    if(strpos($name, 'get') === 0) {
      return $this->__get(strtolower(substr($name, 3, 1)) . substr($name, 4));
    } elseif(strpos($name, 'set') === 0) {
      return $this->__set(strtolower(substr($name, 3, 1)) . substr($name, 4), $args);
    } elseif(strpos($name, 'is') === 0) {
      $val = $this->__get(strtolower(substr($name, 3, 1)) . substr($name, 4));
      return !empty($val);
    }
  }

  public function __get($name) {
    $m = 'get' . ucfirst($name);
    if(method_exists($this, $m)) {
      return $this->$m();
    }
    if(property_exists($this, $name)) {
      return $this->$name;
    }
  }

  public function __set($name, $value) {
    $m = 'set' . ucfirst($name);
    if(method_exists($this, $m)) {
      return $this->$m($value);
    }
    if(property_exists($this, $name) || $name == 'id' || $name == 'machine' || $name == 'discriminator') {
      $this->$name = $value;
    } else {
      //drupalwiki_spaces_log('no property with name ' . $name . ' in ' . get_class($this));
    }
  }