Call `func(i,j).show(ax)` for every combination of `r,c`

def show_multi(func:Callable[[int,int],Image], r:int=1, c:int=1, figsize:Tuple=(9,9)):
    "Call `func(i,j).show(ax)` for every combination of `r,c`"
    plot_multi(lambda i,j,ax: func(i,j).show(ax), r, c, figsize=figsize)