"interested person" means the decedent's children, spouse, other heirs, beneficiaries, creditors, and any others having a property right in or claim against the estate of the decedent which may be affected by the year's support proceedings [...]

"Interested person" means a trustee, beneficiary, or any other person having an interest in or claim against the trust. This meaning, as it relates to particular persons, may vary from time to time and must be determined according to the particular purposes of and [...]