def get_property_keys(self):
        return self.element_class._properties.keys()
Make sure we tolerate all sorts of crazy line breaks and comments in
dataset/ETHPy150Open espeed/bulbs/bulbs/model.py/NodeProxy.get_property_keys--crossover with--dataset/ETHPy150Open erikrose/parsimonious/parsimonious/tests/test_grammar.py/GrammarTests.test_multi_line