import { IModelRef } from '../interfaces/IModelRef';
import { PureCollection } from '../PureCollection';
import { PureModel } from '../PureModel';
export declare class ToOne<T extends PureModel> {
    protected __collection?: PureCollection | undefined;
    protected __readonly: boolean;
    protected __model?: PureModel | undefined;
    protected __key?: string | undefined;
    protected __skipMissing: boolean;
    private __rawValue;
    constructor(data: T | IModelRef | null, __collection?: PureCollection | undefined, __readonly?: boolean, __model?: PureModel | undefined, __key?: string | undefined, __skipMissing?: boolean);
    setCollection(value: PureCollection | undefined): void;
    get value(): T | null;
    set value(data: T | null);
    get refValue(): IModelRef | null;
    toJSON(): IModelRef | null;
    get snapshot(): IModelRef | null;
    protected __getModel(model: T | IModelRef | null): T | null;
}