Any 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, infant, incompetent, or insolvent may have a declaration of rights or legal relations in respect thereto:

1. (1) To ascertain any class of creditors, devisees, legatees, heirs, next of kin, or other;
2. (2) To direct the executors, administrators, or trustees to do or abstain from doing any particular act in their fiduciary capacity; or
3. (3) To determine any question arising in the administration of the estate or trust, including questions of construction of wills and other writings.

(Acts 1935, No. 355, p. 777; Code 1940, T. 7, §159.)