code: def dimensions(self):
          
          # First of all: Select this dataset
          if self.scraper.current_item is not self:
              self._move_here()
  
          if self._dimensions is None:
              self._dimensions = DimensionList()
              for d in self.scraper._fetch_dimensions(self):
                  d.dataset = self
                  d.scraper = self.scraper
                  self._dimensions.append(d)
          return self._dimensions
docs: Available dimensions, if defined.