if contextCanceled(ctx) {
		return context.Canceled
	}
	maxCount, maxErr := reduceErrs(errs, ignoredErrs)
	if maxCount >= quorum {
		return maxErr
	}
	return quorumErr
}

// reduceReadQuorumErrs behaves like reduceErrs but only for returning
// values of maximally occurring errors validated against readQuorum.