code: def to_string(self, limit=None):
          
          header = self.short_string()
          if len(self) == 0:
              return header
          contents = ""
          element_lines = [
              "  -- %s" % (element,)
              for element in self.elements[:limit]
          ]
          contents = "\n".join(element_lines)
  
          if limit is not None and len(self.elements) > limit:
              contents += "\n  ... and %d more" % (len(self) - limit)
          return "%s\n%s" % (header, contents)
docs: Create a string representation of this collection, showing up to
          `limit` items.