method AsyncResult.prototype.unwrapOrElse AsyncResult.prototype.unwrapOrElse<U>(fn: (error: E) => U): Promise<T | U> Returns the Ok value or computes a default from the error. Type Parameters U The type of the default value Parameters fn: (error: E) => U Function to compute the default value from the error Return Type Promise<T | U> Promise of the Ok value or the computed default value