@Override
    public int hashCode() {
        int result = selector.hashCode();
        result = 31 * result + (ignoreResult ? 1 : 0);
        result = 31 * result + (cache != null ? cache.hashCode() : 0);
        return result;
    }
<p>Returns the suffix of this hop's selector from, but not including, the
given index.</p>

@param fromNotIncluding The index from which to generate suffix.
@return The suffix after the index.
messagebus/src/main/java/com/yahoo/messagebus/routing/Hop.java