human
Here's a good function header given the following:
I wrote the below code

    @util.decorator
    def generate(fn, *args, **kw):
        self = args[0]._clone()
        for assertion in assertions:
            assertion(self, fn.__name__)
        fn(self, *args[1:], **kw)
        return self
    return generate

What's a good function header?
assistant
#Here's a good function header.

def _generative(*assertions):