710.105 Transfer by gift or exercise of power of appointment.—A person may make a transfer by irrevocable gift to, or the irrevocable exercise of a power of appointment in favor of, a custodian for the benefit of a minor pursuant to s. 710.111. Notwithstanding s. 710.106, a transfer by irrevocable gift from a trust over which the grantor has at the time of transfer a right of revocation, as defined in s. 733.707(3)(e), shall be treated for all purposes under this act as a transfer made directly by the grantor of the trust.