function draw_sprite_ext_optional(arg0 = sprite_index, arg1 = image_index, arg2 = x, arg3 = y, arg4 = image_xscale, arg5 = image_yscale, arg6 = image_angle, arg7 = image_blend, arg8 = image_alpha)
{
    draw_sprite_ext(arg0, arg1, arg2, arg3, arg4, arg5, arg6, arg7, arg8);
}