import { GraphxrReduxState } from "./redux/getReduxState";
import { Brand } from "./typescript/brand";
export type GraphxrEvent = "change" | "select" | "nearby" | "load";
export type GraphxrEventCallback = ((event: GraphxrEvent, data?: unknown) => void) & {
    previousState?: GraphxrReduxState;
};
export type GraphxrEventCallbackId = Brand<string, "ApiEventCallbackId">;
export declare function on(event: GraphxrEvent, callback: GraphxrEventCallback, callbackId?: GraphxrEventCallbackId): GraphxrEventCallbackId;