import { RangeBase } from "./range-base.js";
import type { Unbounded } from "./range-like.js";
export declare class StringRange extends RangeBase<string> {
    label: string;
    constructor(isLowerInc: boolean, lower: string | Unbounded, upper: string | Unbounded, isUpperInc: boolean);
    isType(obj: unknown): obj is string;
}
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