def Param(self, param_name, chart=None):
    if chart is None:
      chart = self.chart
    params = chart.display._Params(chart)
    return params[param_name]
Comments are prefixes for Leaf nodes. Returns whether the given node has a
dataset/ETHPy150Open baz/app-sales-machine/lib/graphy/graphy_test.py/GraphyTest.Param--crossover with--dataset/ETHPy150Open PythonCharmers/python-future/src/libfuturize/fixer_util.py/is_shebang_comment