@Override
    public final boolean equals(final Object o) {
        if (this == o) {
            return true;
        }
        if (o == null || this.getClass() != o.getClass()) {
            return false;
        }
        final Quartet<?, ?, ?, ?> quartet = (Quartet<?, ?, ?, ?>) o;
        return Objects.equals(this.first(), quartet.first())
                && Objects.equals(this.second(), quartet.second())
                && Objects.equals(this.third(), quartet.third())
                && Objects.equals(this.fourth(), quartet.fourth());
    }
Get the fourth value

@return Fourth value
cloud-core/src/main/java/org/incendo/cloud/type/tuple/Quartet.java