def _initialize_variables(self, variables):
        self.sentinels = defaultdict(set)
        self.occurrence_count = defaultdict(int)
        self.variable_set = [False] * (len(variables) + 1)
Returns the restricted serialized data for the instance prepared
dataset/ETHPy150Open sympy/sympy/sympy/logic/algorithms/dpll2.py/SATSolver._initialize_variables--crossover with--dataset/ETHPy150Open OpenSlides/OpenSlides/openslides/agenda/access_permissions.py/ItemAccessPermissions.get_restricted_data