import { FlatTemplatable } from "tempstream";
import { FormField } from "../fields/field.js";
import { FormDataValue } from "../form-types.js";
import { FormControl, FormControlContext } from "./form-control.js";
export declare class Derived<Consts extends Record<string, unknown | undefined>> extends FormControl {
    fields: FormField[];
    _render: (values: Record<string, string>, consts: Consts) => Promise<FlatTemplatable>;
    getConsts: (fctx: FormControlContext) => Promise<Consts>;
    role: "decoration";
    constructor(fields: FormField[], _render: (values: Record<string, string>, consts: Consts) => Promise<FlatTemplatable>, getConsts?: (fctx: FormControlContext) => Promise<Consts>);
    getBackendValues(fctx: FormControlContext): Promise<Record<string, FormDataValue>>;
    render(fctx: FormControlContext): Promise<FlatTemplatable>;
}