@staticmethod
    def check_precondition():
        return True, ""
Toggle the disabled attribute.
dataset/ETHPy150Open google/nogotofail/nogotofail/mitm/connection/handlers/base.py/BaseHandler.check_precondition--crossover with--dataset/ETHPy150Open anandology/pyjamas/library/pyjamas/ui/CustomButton.py/CustomButton.toggleDisabled