Type Alias $<T, $O>

$<T, $O>: IsUndefined.$<T, {
    $else: NotAssignable.$<T, void, $O>;
    $then: $ResolveBranch<T, $O, [$Then]>;
}>

🧰 type util

Validate if T is undefined.

This is a type util for building custom types. It does not check against special types.

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