export declare function assertNotNull(aValue: any, aName?: string): void;
export declare function assertParameter(aValue: any, aParameterName: string): void;
export declare function isValidUrl(aValue: any): aValue is string;
export declare function assertIsUrl(aValue: any, aName?: string): string;
export declare function isValidEmail(aValue: any): aValue is string;
export declare function isValidUserName(aValue: any): aValue is string;
export declare function assertIsEmail(aValue: any, aName?: string): string;
export declare function assertIsValidUserName(aValue: any, aName?: string): string;
export declare function assertHasTrailingSlash(aValue: any): string;