def do_default(value, default_value=u'', boolean=False):
    if isinstance(value, Undefined) or (boolean and not value):
        return default_value
    return value
Verify all the public functions are also declared in a header
dataset/ETHPy150Open GoogleCloudPlatform/appengine-flask-skeleton/lib/jinja2/filters.py/do_default--crossover with--dataset/ETHPy150Open myint/cppclean/cpp/find_warnings.py/WarningHunter._check_public_functions