def __init__(self , filename = None) :
        BaseIO.__init__(self)
        self.filename = filename
Hook for each class inheriting from ForeignKeyBuilder, to perform checks on the
dataset/ETHPy150Open NeuralEnsemble/python-neo/neo/io/elanio.py/ElanIO.__init__--crossover with--dataset/ETHPy150Open awesto/django-shop/shop/models/deferred.py/ForeignKeyBuilder.perform_model_checks