human
I wrote the below code

    def f(_1, _2, _3, _4):
        raise Exception('Test    Exception    raised    by    fake    lookup_image')
    stubs.Set(vm_utils, 'lookup_image', f)

What's a good function header?

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

def stubout_lookup_image(stubs):