export declare const EXT: string[]; export declare const REGEX: RegExp; export declare const MAIN: string; export declare const DECLARATION = "d.ts"; export declare const MAP = "js.map"; export declare const CONTENT_TYPE: { ts: string; tsx: string; }; export declare function only(files: Array): Array; export declare function fromJs(file: string): Array | null; export declare function fromDTS(file: string): Array | null; export declare function toTS(file: string): string; export declare function toTSX(file: string): string; export declare function toDTS(file: string): string; export declare function isTS(file: string): boolean; export declare function isTSX(file: string): boolean; export declare function isDTS(file: string): boolean; export declare function isMAP(file: string): boolean; export declare function toJS(ext: string): string | null; export declare function isTypescript(file: string): boolean;