export declare type Optimisable<T extends string | number> = T & {
    optimise(value: T): string | number;
};
export declare const createOptimisable: <T extends string | number>(value: T, optimise: (value: T) => string | number) => Optimisable<T>;
export declare const createWebOptimisable: <T extends string | number>(value: T, optimise: (value: T) => string | number) => Optimisable<T>;
export declare const isOptimisable: <T extends string | number>(value: T) => value is Optimisable<T>;