def METHOD_NAME(self):
    model = ConcreteModel()
    model.a = Var()
    model.b = Var()
    model.c = Var()
    terms = [
        model.a,
        model.b,
        model.c,
        (model.a, model.a),
        (model.b, model.b),
        (model.c, model.c),
        (model.a, model.b),
        (model.a, model.c),
        (model.b, model.c),
    ]
    model.obj = Objective(expr=self._gen_expression(terms))
    model.con = Constraint(expr=self._gen_expression(terms) <= 1)
    self._check_baseline(model)