def write_xml_value(self, parent_el, prop_xml_name, model,
                        blob_info_format):
        value = self.get_value_as_string(model)
        if(value is EMPTY_VALUE):
            return None
        return append_child(parent_el, prop_xml_name, value,
                            self.property_type)
Clears all key/value pairs.
dataset/ETHPy150Open jahlborn/appengine-rest-server/src/main/python/rest/__init__.py/PropertyHandler.write_xml_value--crossover with--dataset/ETHPy150Open ejeschke/ginga/ginga/misc/Bunch.py/threadSafeBunch.clear