type FormatFn = (value: number | bigint) => string;
type InputType = 'time' | 'temperature' | 'bytes' | 'bits' | 'decimal' | 'currency' | 'percent' | 'throughput';
type Locals = 'en-US' | 'en-GB';
export declare function getFormatterFromCache(key: Array<string | number | boolean | undefined>, inputType: InputType, formatterOptions: Intl.NumberFormatOptions, locals?: Locals): FormatFn;
export interface IFormatterStats {
    countCacheItems: (inputType: InputType | 'all') => number;
    getKeys: (inputType: InputType) => string[];
}
export declare const getFormatterStats: () => IFormatterStats;
export {};
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