@traversable/schema
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    nonempty: {
        array: <T>(
            xs: T[] | readonly T[],
        ) => xs is { "0": NonNullable<T> } & (T[] | readonly T[]);
    } = ...

    Type declaration

    • array: <T>(
          xs: T[] | readonly T[],
      ) => xs is { "0": NonNullable<T> } & (T[] | readonly T[])