code: def prepare(self):
          
  
          msg = aioxmpp.stanza.Message(
              to=self.to,
              from_=self.sender,
              type_=aioxmpp.MessageType.CHAT,
          )
  
          msg.body[None] = self.body
  
          # Send metadata using xep-0004: Data Forms (https://xmpp.org/extensions/xep-0004.html)
          if len(self.metadata):
              data = forms_xso.Data(type_=forms_xso.DataType.FORM)
  
              for name, value in self.metadata.items():
                  data.fields.append(
                      forms_xso.Field(
                          var=name,
                          type_=forms_xso.FieldType.TEXT_SINGLE,
                          values=[value],
                      )
                  )
  
              if self.thread:
                  data.fields.append(forms_xso.Field(var="_thread_node",
                                                     type_=forms_xso.FieldType.TEXT_SINGLE,
                                                     values=[self.thread]))
  
              data.title = SPADE_X_METADATA
              msg.xep0004_data = [data]
  
          return msg
docs: Returns an aioxmpp.stanza.Message built from the Message and prepared to be sent.
  
          Returns:
            aioxmpp.stanza.Message: the message prepared to be sent