export type Requiredish<T> = {
    [K in keyof Required<T>]: T[K];
};
export type Extends<T, U extends T> = U;
export type IsExact<T, U> = [T] extends [U] ? [U] extends [T] ? true : false : false;
export declare function assertExactType<T extends true>(_expectTrue: T): void;