import { ObjectId } from './objectid';
export interface IDocument {
    _id: ObjectId;
    toJSON?(options?: any): any;
    toObject?(options?: any): any;
    save(): Promise<any>;
}
/**
 * Document base class for mongoose compatibility.
 * Can be extended by user classes or used for instanceof checks.
 * This is primarily for mocking/compatibility - actual documents
 * are plain objects with methods attached by the Model.
 */
export declare class Document implements IDocument {
    _id: ObjectId;
    toJSON(_options?: any): any;
    toObject(_options?: any): any;
    save(): Promise<this>;
}
export type { IDocument as DocumentInterface };
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