code: def get_history(self):
          
          for child in xml_element_iter(self.xmlnode.children):
              if get_node_ns_uri(child) == MUC_NS and child.name == "history":
                  maxchars = from_utf8(child.prop("maxchars"))
                  if maxchars is not None:
                      maxchars = int(maxchars)
                  maxstanzas = from_utf8(child.prop("maxstanzas"))
                  if maxstanzas is not None:
                      maxstanzas = int(maxstanzas)
                  maxseconds = from_utf8(child.prop("maxseconds"))
                  if maxseconds is not None:
                      maxseconds = int(maxseconds)
                  # TODO: since -- requires parsing of Jabber dateTime profile
                  since = None
                  return HistoryParameters(maxchars, maxstanzas, maxseconds, since)
docs: Return history parameters carried by the stanza.
  
          :returntype: `HistoryParameters`