fun domain(domain: String): Builder = domain(domain, false)

    /**
     * Set the host-only domain for this cookie. The cookie will match [domain] but none of
     * its subdomains.
     */
    fun hostOnlyDomain(domain: String): Builder = domain(domain, true)

    private fun domain(
      domain: String,
      hostOnly: Boolean,
    ) = apply {
      val canonicalDomain =
        domain.toCanonicalHost()