import { Workout } from 'fitness-models';
import { TransferAdapter } from './transfer-adapters/TransferAdapter';
export default class WorkoutTransfer {
    private from;
    private to;
    constructor(from: TransferAdapter, to: TransferAdapter);
    getFrom(): TransferAdapter<any>;
    getTo(): TransferAdapter<any>;
    copyWorkout(id: string, extender?: (workout: Workout) => Promise<Workout>): Promise<string | null>;
}