The ability to use js doc styles and text in a dot ts. If if it's a function argument, you can just name the argument what you want. It all depends right like do you do we even need that at the other another one was um I was doing some mapping. Like very common in mapping applications to use latitude longitude in an array. You literally have no idea Which which it is so you can create what's called like a branded type or you could do A brand type is essentially just creating an alias.

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