export type Collector<P> = () => P;
export type Responder<P> = (payload: P) => void;
export type Lean = {
    stop: () => void;
    collect: <P>(collector: Collector<P>) => P;
};
export interface ReactorCore {
    reaction<P>(collector: Collector<P>, responder?: Responder<P>): () => void;
    lean(actor: () => void): Lean;
}