export declare class NumberSet {
    readonly numbers: number[];
    readonly set: Set<number>;
    constructor(numbers: readonly number[]);
    difference(other: NumberSet): NumberSet;
    intersection(other: NumberSet): NumberSet;
    union(other: NumberSet): NumberSet;
    isEmpty(): boolean;
    isSubsetOf(other: NumberSet): boolean;
    isSupersetOf(other: NumberSet): boolean;
    isEqual(other: NumberSet): boolean;
    min(): number | undefined;
    max(): number | undefined;
}
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