[x] Contains - allows checking if a string, list, or array contains something
[x] IsNotNil - to use when you only can ensure something isn't nil
[x] IsNotEmpty - to use when you only can ensure something isn't empty
[ ] ~IsNotEqual - to use when you only can ensure something isn't equal~ - Checking for inequality isn't the best way to test, and seems to be rare in practice
[x] ~StrictEquals - to ensure something is strictly equal (empty maps or slices != nil) or explore making this functionality the default for Equals~ Made Equals stricter instead
[x] MatchesAllErrors - to ensure an error is multiple errors, for validating wrapping
Contains- allows checking if a string, list, or array contains somethingIsNotNil- to use when you only can ensure something isn'tnilIsNotEmpty- to use when you only can ensure something isn't emptyIsNotEqual- to use when you only can ensure something isn't equal~ - Checking for inequality isn't the best way to test, and seems to be rare in practiceStrictEquals- to ensure something is strictly equal (empty maps or slices != nil) or explore making this functionality the default forEquals~ MadeEqualsstricter insteadMatchesAllErrors- to ensure an error is multiple errors, for validating wrapping