(a) Sections 255.053 and 255.054 apply only to a pretermitted child who is not:
(1) mentioned in the testator's will;
(2) provided for in the testator's will; or
(3) otherwise provided for by the testator.
(b) For purposes of this subchapter, a child is provided for or a provision is made for a child if a disposition of property to or for the benefit of the pretermitted child, whether vested or contingent, is made:
(1) in the testator's will, including a devise to a trustee under Section 254.001; or
(2) outside the testator's will and is intended to take effect at the testator's death.