export declare function getValueOrUndefined<T>(value: T | null | undefined): T | undefined;
export declare function throwIfNullOrUndefined<T>(value: T | null | undefined, name: string): T;
export declare function getArray<T>(value: ReadonlyArray<T> | null | undefined): ReadonlyArray<T>;
export declare function notNull<T>(value: T | null | undefined): value is T;