wrap MimeRender decorator so you have access to the original wrapped function

gistfile1.py

class MimeRender(mimerender.FlaskMimeRender):
    def __call__(self, *args, **kwargs):
        ret = super(MimeRender, self).__call__(*args, **kwargs)
        def wrap(target):
            target._orig_func = target
            return ret(target)
        return wrap
mimerender = MimeRender()