def set_config_entry(self, entry, value, widget_id=None):
"""
Sets a configuration entry for this module.
If there is a widget id given, it changes the same
configuration value of this widget.
"""
configuration = Configuration()
if widget_id is not None:
widget = Module.get_widget(widget_id)
configuration.set_entry(entry,value,widget=widget)
else:
configuration.set_entry(entry,value,module=self)
