public CookieBuilder maxAge(long maxAge) {
        this.maxAge = maxAge;
        return this;
    }
Sets the maximum age of the {@link Cookie} in seconds. If an age of {@code 0} is specified,
the {@link Cookie} will be automatically removed by browser because it will expire immediately.
If {@link Cookie#UNDEFINED_MAX_AGE} is specified, this {@link Cookie} will be removed when the
browser is closed. If unspecified, {@link Cookie#UNDEFINED_MAX_AGE} will be used.

@param maxAge The maximum age of this {@link Cookie} in seconds
core/src/main/java/com/linecorp/armeria/common/CookieBuilder.java