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const isNonNullable = <T>(arg: T): arg is NonNullable<T> =>    arg !== undefined && arg !== null;
const nonNullableImpl = <T>(data: T) =>    !isNonNullable(data) ? null : [data] as const;
export const nonNullable =    <T>(): import("../../types/index.ts").Operator.fλ.Stateless<T, NonNullable<T>> =>        nonNullableImpl;