def __init__(self, database, items_set, name):
        if '!!' in name:
            raise ValueError("Disallowed character sequence '!!' in collection name")

        self.name = name
        self.db = items_set.prefixed_db(name.encode()+b'!!')
        self.parent_db = database

        self.refresh()
dataset/ETHPy150Open corbt/pypeline/pypeline/DB.py/Collection.__init__/original