public Builder expiresAt(long expiresAt) {
            if (expiresAt <= 0) {
                expiresAt = Long.MIN_VALUE;
            }
            if (expiresAt > MAX_DATE) {
                expiresAt = MAX_DATE;
            }
            this.expiresAt = expiresAt;
            this.persistent = true;
            return this;
        }
Set the cookie expires time.

@param expiresAt When the cookie expired.
@return The same builder.
netbare-injector/src/main/java/com/github/megatronking/netbare/http/Cookie.java