Display region of convergence in MATLAB like that in theory books?

https://dsp.stackexchange.com/questions/83285/finding-and-displaying-laplace-or-z-transform-rocregion-of-convergence-using-m

Above question has some relevant but not complete detail. For example if we want to indicate region of convergence like hatched area(area having diagonal lines) just like in theory books

How this can be achieved in MATLAB figure??