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Sep 3, 2025
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expand Readme #1

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Expand Up @@ -108,3 +108,8 @@ when the callable argument has a certain type signature. One way to achieve this
to restrict the allowed types of the callable argument to chosen subtypes of
`CallableWithReturnType`. This includes `CallableWithTypeSignature`, so the entire
type signature, except any keyword arguments, may be accounted for.

For example, a `CallableWithReturnType{Float32}` is guaranteed to return a
`Float32` value, if a value is returned. A
`CallableWithTypeSignature{Float32, Tuple{Float32, Float32}}` additionally
guarantees to only accept exactly two `Float32` values as positional arguments.