export declare class FileSystem {
    static FILE_NAME_SPLIT_CHARACTER: string;
    listFileNames(path: string): string[];
    listValidDirectories(inputDirectory: string): string[];
    isEmpty(path: string): boolean;
    isHidden(fileOrDirectoryName: string): boolean;
    isDirectory(path: string): boolean;
    filterSupportedDocumentFileNames(fileNames: string[], supportedExtensions: string[]): string[];
    shouldIgnoreFile(fileNameSplitByDot: string[]): boolean;
    readFilesContent(filePaths: string[]): any[];
}
export declare const fileSystem: FileSystem;