import type { Constructor, DebugFunction, PlainData } from './types';
export declare class Entity<T> {
    private readonly _debugFunction?;
    private readonly _debugSkipUndef?;
    private _c;
    constructor(_data?: PlainData<T> | null, _debugFunction?: DebugFunction | undefined, _debugSkipUndef?: boolean | undefined);
    isValid(): boolean;
    update(data?: PlainData<T>): void;
    private _init;
}
export declare function Model<T extends Constructor>(constructor: T): Constructor;