async setPicture(media) {
        const success = await this.client.pupPage.evaluate((chatid, media) => {
            return window.WWebJS.setPicture(chatid, media);
        }, this.id._serialized, media);

        return success;
    }
Sets the group's picture.
@param {MessageMedia} media
@returns {Promise<boolean>} Returns true if the picture was properly updated. This can return false if the user does not have the necessary permissions.