code: def container(self, node, elem, module, path):
          
          nel, newm, path = self.sample_element(node, elem, module, path)
          if path is None:
              return
          if self.annots:
              pres = node.search_one("presence")
              if pres is not None:
                  nel.append(etree.Comment(" presence: %s " % pres.arg))
          self.process_children(node, nel, newm, path)
docs: Create a sample container element and proceed with its children.