def METHOD_NAME(self, _):
    ufmt = ("https://i.nhentai.net/galleries/" +
            self.data["media_id"] + "/{}.{}")
    extdict = {"j": "jpg", "p": "png", "g": "gif"}
    return [
        (ufmt.format(num, extdict.get(img["t"], "jpg")), {
            "width": img["w"], "height": img["h"],
        })
        for num, img in enumerate(self.data["images"]["pages"], 1)
    ]