Create a sample container element and proceed with its children.

def container(self, node, elem, module, path):
        """Create a sample container element and proceed with its children."""
        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)