export declare class FileHelper {
    static GetFileName(fullPath: string | null): string | null;
    static GetFileExtension(fullPath: string | null): string | null | undefined;
    static GetFileIcon(fullPath: string | null): string | null;
    static DataURItoBlob(dataURI: string | null): Blob | null;
    static DownloadBlobFile(data: any, headers: {
        [key: string]: string;
    }): void;
    static LoadFile(event: Blob): Promise<unknown>;
    /**
     * Initiates a download of a text file with the specified filename and content.
     *
     * @param filename - The name of the file to be downloaded, including the file extension.
     * @param text - The text content to be included in the file.
     * @param data_uri - (Optional) The data URI prefix used to encode the text as a downloadable file.
     *                   Defaults to "data:text/plain;charset=utf-8,".
     */
    static DownloadText(filename: string, text: string, data_uri?: string): void;
    /**
     * Retrieves the image source URL for a file's extension, based on its filename.
     *
     * @param filename - The name of the file from which to extract the extension.
     * @returns The URL of the image representing the file type based on its extension.
     *          If the extension is not found, a default image path is returned.
     */
    static GetFileExtensionImage(filename: string): any;
}