import { UnitSystemDefinition, UnitConvertOptions, UnitDefinition } from '../types/convert';
import { UnitSystem } from './unit-system';
export declare abstract class UnitType<T = unknown> {
    name: string;
    private _systems;
    constructor(name: string, systems: UnitSystemDefinition[]);
    hasUnit(unit: T): boolean;
    findUnit(unit: T): UnitDefinition<T>;
    findUnitSystem(unit: T): UnitSystem<T>;
    convert(value: number | string, { from, to }: UnitConvertOptions<T>): number | string;
}