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    Variable setSubsetAssertionConst

    setSubsetAssertion: AssertionFunctionSync<
        readonly [
            ZodCustom<Set<unknown>, Set<unknown>>,
            "to be a subset of",
            ZodCustom<Set<unknown>, Set<unknown>>,
        ],
        (subset: Set<unknown>, superset: Set<unknown>) => boolean,
        readonly [
            ZodCustom<Set<unknown>, Set<unknown>>,
            PhraseLiteralSlot<"to be a subset of">,
            ZodCustom<Set<unknown>, Set<unknown>>,
        ],
    > = ...

    Asserts that one Set is a subset of another.

    expect(new Set([1, 2]), 'to be a subset of', new Set([1, 2, 3])); // passes
    expect(new Set([1, 4]), 'to be a subset of', new Set([1, 2, 3])); // fails

    set-to-be-a-subset-of-set

    collections