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    Variable stringIncludesAssertionConst

    stringIncludesAssertion: AssertionFunctionSync<
        readonly [
            ZodString,
            readonly ["includes", "contains", "to include", "to contain"],
            ZodString,
        ],
        (subject: string, expected: string) => { message: string } | undefined,
        readonly [
            ZodString,
            PhraseLiteralChoiceSlot<
                readonly ["includes", "contains", "to include", "to contain"],
            >,
            ZodString,
        ],
    > = ...

    Assertion for testing if a string includes/contains another string.

    expect('hello world', 'includes', 'world'); // passes
    expect('hello world', 'contains', 'foo'); // fails
    expect('hello world', 'to include', 'hello'); // passes
    expect('hello world', 'to contain', 'bar'); // fails