checkPublicSuffix(".example.com", null)
    checkPublicSuffix(".example.example", null)
    // Unlisted TLD.
    checkPublicSuffix("example", null)
    checkPublicSuffix("example.example", "example.example")
    checkPublicSuffix("b.example.example", "example.example")
    checkPublicSuffix("a.b.example.example", "example.example")
    // Listed, but non-Internet, TLD.
    // checkPublicSuffix("local", null);