Unable to find the STL File

I am unable to find the STL file in the example given in the below link

https://in.mathworks.com/help/pde/ug/stl-file-import.html

[dpb]

gm = importGeometry("Torus.stl");
pdegplot(gm)

The examples are using files included in the Partial Differential Equation Toolbox™. To run them on local machine, you'll have to have that toolbox installed -- which means will need a license for it, (or, perhaps, for purpose of simply the examples/learning, you may be able to download a trial copy; I've not checked to see).