declare module 'switchman' {
  import * as t from '@babel/types';
  import ASTNode = t.Node;

  type AttrValue = ASTNode | ASTNode[] | string;

  namespace SwitchMan {
    interface SwitchOption {
      method: string;
      defaultPatchFile?: string;
      mappings: [];
    }

    interface $ {
      (code: string, options?: SwitchOption): void;
      loadFile(path: string, options: SwitchOption): void;
      writeFile(code: string, filename: string): void;
    }
  }
  const SwitchManCode: SwitchMan.$;
  export = SwitchManCode;
}