import { Observable } from 'rxjs';
export declare function getFileDesc(file: File): FileDescription;
export declare function getFileExt(file: File): string;
export declare function timeout(delay: number): Observable<number>;
export declare function toCamelCase(obj: any): any;
export declare function toSnakeCase(obj: any): any;
export interface FileDescription {
    name: string;
    path: string;
    type: string;
    size: number;
}