import { Model, ModelInstance } from "./index";
export declare type lazyModel<P, M extends ModelInstance<P>> = Model<P, M> | (() => Model<P, M> | null);
export declare type metaRelation = {
    from: lazyModel<any, any>;
    to: lazyModel<any, any>;
    via: string;
};
export declare type lazyMetaRelation = metaRelation | (() => metaRelation | null);
export declare type relationProperty = {
    dest: lazyModel<any, any>;
    relation: lazyMetaRelation;
    out?: boolean;
    any?: boolean;
    propertyName: string;
    many: boolean;
};
export declare const relation: {
    from: <P1, M1 extends ModelInstance<P1, {}>>(from: lazyModel<P1, M1>) => {
        to: <P2, M2 extends ModelInstance<P2, {}>>(to: lazyModel<P2, M2>) => {
            via: (via: string) => metaRelation;
        };
    };
};
export declare const hasMany: <P, M extends ModelInstance<P, {}>>(model: lazyModel<P, M>, relation: lazyMetaRelation, direction?: "any" | "in" | "out") => (target: any, key: string) => void;
export declare const hasOne: <P, M extends ModelInstance<P, {}>>(model: lazyModel<P, M>, relation: lazyMetaRelation, direction?: "any" | "in" | "out") => (target: any, key: string) => void;
export declare const model: <P, M extends ModelInstance<P, {}>>(model: lazyModel<P, M>) => (target: any) => void;
export declare const defaultProps: (props: any) => (target: any) => void;
export declare function extendModelInstance<P, M extends ModelInstance<P>>(instance: new () => M): new () => M;