import { IGatsbyState, ActionsUnion } from "../types";
export declare const babelrcReducer: (state: {
    stages: {
        develop: import("../types").IBabelStage;
        "develop-html": import("../types").IBabelStage;
        "build-javascript": import("../types").IBabelStage;
        "build-html": import("../types").IBabelStage;
    };
} | undefined, action: ActionsUnion) => IGatsbyState["babelrc"];