def __init__(self, rules, header=None, separator=''):
        if header:
            rule_set = [Header(header)] + list(rules)
        else:
            rule_set = list(rules)

        super(FieldSet, self).__init__(rule_set, separator=separator)
Constructor.
dataset/ETHPy150Open mrjoes/flask-admin/flask_admin/form/rules.py/FieldSet.__init__