@staticmethod
def safe_integer_2(dictionary, key1, key2, default_value=None):
    return Exchange.safe_either(Exchange.safe_integer, dictionary, key1, key2, default_value)
@staticmethod
def safe_integer_2(dictionary, key1, key2, default_value=None):
    return Exchange.safe_either(Exchange.safe_integer, dictionary, key1, key2, default_value)