public @Nullable Boolean isInheritorOf(JvmNodeReferenceID who, final JvmNodeReferenceID whom) {
    if (who.equals(whom) || !isEmpty(filter(allSupertypes(who), st -> st.equals(whom)))) {
      return Boolean.TRUE;
    }
    return null;
  }
public @Nullable Boolean isInheritorOf(JvmNodeReferenceID who, final JvmNodeReferenceID whom)