/// <reference types="react" />
export declare const range: (length: number) => any;
export declare const toOption: (op: string | number) => "" | {
    value: import("react").ReactText;
    label: import("react").ReactText;
};
export declare const toOptions: (arr: (string | number)[]) => ("" | {
    value: import("react").ReactText;
    label: import("react").ReactText;
})[];
export declare const arrayDifference: <T>(array1: T[], array2: T[]) => T[];
export declare const uniqueArray: <T>(items: T[]) => T[];
export declare const sortBy: (propName: string) => (array: any[]) => any[];
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