A person interested as or through an executor, administrator, trustee, guardian, or other fiduciary, creditor, devisee, legatee, heir, next of kin, or cestui que trust, in the administration of a trust, or of the estate of a decedent, an infant, a person lacking mental capacity, or a person without financial resources, may have a declaration of rights or legal relations in respect thereto:
12 V.S.A. § 4714