Checked Subtract Support

Running the following code...

let z: Array1<u32> = arr1(&[1,0
6BBB
,1]) - arr1(&[0,1,0]);

...causes a panic with attempt to subtract with overflow'

Would it be possible to get support for something such as

let z: Array1<u32> =  arr1(&[1,0,1]).checked_sub(arr1(&[0,1,0])).unwrap();

or is there an alternative approach one can suggest?

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