def ping(self, data):
     flag = isinstance(data, serializable.Serializable)
     if flag:
         data = serializable.serialize_object(data)
     data = self.__ibus.Ping(data, dbus_interface="org.freedesktop.IBus")
     if flag:
         data = serializable.deserialize_object(data)
     return data

 def set_surrounding_text(self, text, cursor_pos):
     if self.__surrounding_text.get_text() != text or \
             self.__surrounding_cursor_pos != cursor_pos:
         self.__surrounding_text = Text(text)
         self.__surrounding_cursor_pos = cursor_pos
         text = serializable.serialize_object(self.__surrounding_text)
         cursor_pos = dbus.UInt32(self.__surrounding_cursor_pos)
         self.__context.SetSurroundingText(text, cursor_pos)

 def update_property(self, prop):
     dbus_values = serializable.serialize_object(prop)
     return self.__proxy.UpdateProperty(dbus_values)

 def register_properties(self, props):
     dbus_values = serializable.serialize_object(props)
     return self.__proxy.RegisterProperties(dbus_values)

 def update_lookup_table(self, lookup_table, visible, just_current_page = False):
     if just_current_page:
         lookup_table = lookup_table.get_current_page_as_lookup_table()
     dbus_values = serializable.serialize_object(lookup_table)
     return self.__proxy.UpdateLookupTable(dbus_values, visible)

 def update_auxiliary_text(self, text, visible):
     text = serializable.serialize_object(text)
     return self.__proxy.UpdateAuxiliaryText(text, visible)

 def update_preedit_text(self, text, cursor_pos, visible, mode=common.IBUS_ENGINE_PREEDIT_CLEAR):
     text = serializable.serialize_object(text)
     return self.__proxy.UpdatePreeditText(text, cursor_pos, visible, mode)

 def commit_text(self, text):
     text = serializable.serialize_object(text)
     return self.__proxy.CommitText(text)

 def register_component(self, component):
     component = serializable.serialize_object(component)
     return self.__ibus.RegisterComponent(component)

 def update_preedit_text(self, text, cursor_pos, visible):
     text = serializable.serialize_object(text)
     return self.__proxy.UpdatePreeditText(text, cursor_pos, visible)