import type { App } from "../app/app.js";
import type Context from "../context.js";
import type { CollectionItem } from "../main.js";
import type Collection from "./collection.js";
export default abstract class CalculatedField<ReturnType> {
    app: App;
    abstract name: string;
    collection: Collection;
    constructor(app: App, collection: Collection);
    abstract calculate(context: Context, item: CollectionItem<any>, db_document: any): Promise<ReturnType>;
}