newRequest: Request,
    ): Boolean =
      cachedResponse.headers.varyFields().none {
        cachedRequest.values(it) != newRequest.headers(it)
      }

    /** Returns true if a Vary header contains an asterisk. Such responses cannot be cached. */
    fun Response.hasVaryAll(): Boolean = "*" in headers.varyFields()

    /**
     * Returns the names of the request headers that need to be checked for equality when caching.