export type AddOptionToUndefined<T> = {
    [K in keyof T as undefined extends T[K] ? never : K]: T[K];
} & {
    [K in keyof T as undefined extends T[K] ? K : never]+?: T[K];
};
export type Simplify<T> = {
    [K in keyof T]: T[K];
} & {};
export declare function print(val: unknown): string;
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