def __init__(self, filename=None):
        self.filename = None
        if filename:
            self.load(filename)
def on_fuzzing_range_start_changed(self, value: int):
        self.ui.sBAddRangeEnd.setMinimum(value)
        self.ui.sBAddRangeStep.setMaximum(self.ui.sBAddRangeEnd.value() - value)