/**
 * Returns the passed `Record` with only the specified extra keys made required, all others are
 * allowed to be `undefined`.
 */
export type RequiredValues<X extends Record<string | symbol, any>, K extends keyof X> = {
    [P in K]: X[P];
} & {
    [P in Exclude<keyof X, K>]: X[P] | undefined;
};
/**
 * Prepares/builds an object and callback which is `useEffect`-like.
 *
 * The returned object is actually a `Proxy`, and when values are changed, the callback is
 * invoked synchronously (as part of the set).
 *
 * This limits updates to those where the `required` fields are defined (second arg of `build`).
 * The second `build()` layer is to allow TypeScript to infer types.
 */
export declare function prepareEffectTrigger<X extends Record<string | symbol, any>>(): {
    build<K extends keyof X>(cb: (signal: AbortSignal, values: RequiredValues<X, K>) => any, required?: K[]): Partial<X>;
};