def METHOD_NAME(self, source):
    """Given a unique key in the store, recreate original source"""
    key = self.get_tok(source)
    s = self[key]()
    meta = s.metadata["original_source"]
    cls = meta["cls"]
    args = meta["args"]
    kwargs = meta["kwargs"]
    cls = import_name(cls)
    sout = cls(*args, **kwargs)
    sout.metadata = s.metadata["original_metadata"]
    sout.name = s.metadata["original_name"]
    return sout