Any executor, administrator, trustee, guardian or other fiduciary, creditor, devisee, legatee, heir, next of kin, or beneficiary, in the administration of a trust, or of the estate of a decedent, an insolvent, a person under 18 years of age or other person for whom a guardian has been appointed, or any person holding an interest in such trust or estate, may seek and obtain declaration of rights or legal relations to:
K.S.A. 60-1706