export declare const ImageFileTypes: string[];
export declare const DocumentFileTypes: string[];
export declare const VideoFileTypes: string[];
export declare const OfficeFileTypes: string[];
/** @deprecated use validateFilenameExplicit */
export declare function validateFilename(fileNameWithExtension: string): {
    hasIllegalCharacter: boolean;
    hasIllegalName: boolean;
    valid: boolean;
};
/** @deprecated use validateFoldernameExplicit */
export declare function validateFoldername(folderName: string): {
    hasIllegalCharacter: boolean;
    hasIllegalName: boolean;
    valid: boolean;
};
export declare function validateAndSetFilename(fileNameWithExtension: string): string;
export declare function getFileExtension(fileName: string, options?: {
    /** send to to return "" when fileName does not have an extension, otherwise it returns the fileName  */
    emptyIfMissing?: boolean;
}): string;
export declare function formatFileSize(sizeInBytes: number): string;