/**
 * Subjects folded by the label they carry and the reason they share.
 *
 * A reason many subjects share is almost never about any one of them. A first
 * run makes every subject `new` for one sentence, and an upgrade that moves the
 * identity key changes every subject for one cause; a 4,705-subject run
 * said one sentence 4,697 times. Every reader that lists subjects without a
 * region — the pull-request docket, `variance_summary` — prints it once with
 * the subjects under it, and both fold here so they agree on what "the same
 * reason" is: the same label and the same words. One sentence under two labels
 * stays two groups, since the labels ask for different actions.
 *
 * Groups keep the place of their first subject, and subjects keep their order.
 */
export declare function byReason<Label extends string>(items: Iterable<{
    readonly label: Label;
    readonly because: string;
    readonly subject: string;
}>): readonly {
    readonly label: Label;
    readonly because: string;
    readonly subjects: readonly string[];
}[];
//# sourceMappingURL=shared-reasons.d.ts.map