import { UnitSystem } from './base/unit-system';
import { UnitType } from './base/unit-type';
import { UnitConvertOptions, UnitDefinition } from './types/convert';
export declare class FieldConverter {
    private static _unitTypes;
    static convert<T = unknown, U = T>(value: number | string, { from, to }: UnitConvertOptions<T, U>): number | string;
    static findUnitType<T = unknown>(unit: T, fallback?: boolean): UnitType<T>;
    static findUnitSystem<T = unknown>(unit: T, fallback?: boolean): UnitSystem<T>;
    static findUnit<T = unknown>(unit: T, fallback?: boolean): UnitDefinition<T>;
    static findNominalUnit<T = unknown>(unit: T, fallback?: boolean): UnitDefinition<T>;
}