Attaches a callback for only the rejection of the Promise.
The callback to execute when the Promise is rejected.
A Promise for the completion of the callback.
Called after thenable and catch.
on final handler of promise.
Attaches callbacks for the resolution and/or rejection of the Promise.
The callback to execute when the Promise is resolved.
The callback to execute when the Promise is rejected.
A Promise for the completion of which ever callback is executed.
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Promise type restricting return type and typed reason for errors.