Section 78. Relief after judgment on obligation constituting trust claim

If
  a  trust beneficiary shall recover judgment against the trustee upon the
  obligation constituting the trust claim: (except in the enforcement of a
  lien as provided in articles two and three of this chapter)
    (a) execution upon the judgment shall not be  levied  upon  any  trust
  asset;
    (b)  to  the extent of trust assets affected by proceedings to enforce
  the judgment, the proceedings shall be deemed to be for the  benefit  of
  all  trust  beneficiaries  who  would,  at  the  time  the proceeding is
  instituted, be entitled to maintain an action to enforce the trust,  and
  the  provisions  of section seventy-seven of this chapter shall apply in
  any such proceedings.