/**
 * The instant a grant stops applying. An expiration is a point in time, not a piece of
 * text: one instant is spelled `2026-12-31T23:59:59Z` in one file, `2026-12-31T20:59:59-03:00`
 * by a team that writes local time, and `2026-12-31T23:59:59.000+0000` by the Salesforce
 * API, so comparing the text would report an endless update between values that agree.
 * The model compares by instant through `asKey()`, truncated to the second (the precision
 * the platform stores), and writes one canonical form back out.
 *
 * Unlike Username and TargetName, this does not keep the text as written: an instant has
 * no spelling worth preserving, so `toString()` and `toJSON()` are the canonical form and
 * a file that round-trips through `export` comes back in it. That is also why only one
 * spelling has to be accepted on the way in: the schema is free to stay strict, because
 * nothing the plugin writes is in any other form.
 *
 * See Username for why these are separate classes rather than one with a shared base.
 */
export declare class Expiration {
    private readonly instant;
    private constructor();
    /**
     * Build from a datetime naming an instant. Throws on anything else: the file boundary
     * validates through the schema first, and the org boundary is handed the platform's
     * own serialization, so a rejection here is a defect rather than bad input.
     */
    static of(value: string): Expiration;
    /** Whether two expirations name the same instant. Both absent (null) counts as equal. */
    static same(left: Expiration | null, right: Expiration | null): boolean;
    /** The value to compare, index, and de-duplicate by: whole seconds since the epoch. */
    asKey(): number;
    equals(other: Expiration): boolean;
    /** The canonical form: UTC, to the second. What the plugin displays and writes. */
    toString(): string;
    /** Keeps `--json` payloads plain strings, in the one form every command reports. */
    toJSON(): string;
}
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