import { TransformOptions } from '@babel/core';
import * as t from 'io-ts';
export declare const BabelRC: t.PartialC<{
    modifier: t.FunctionC;
}>;
export declare type BabelRC = Omit<t.TypeOf<typeof BabelRC>, 'modifier'> & {
    modifier?: (config: TransformOptions) => TransformOptions;
};