Symplectic resolution conjecture for coverings of nilpotent orbit closures

Let $\bar{p}: X \rightarrow \overline{\0}$ be a covering of a nilpotent orbit in a simple Lie algebra $\mathfrak{g}$ such that $R[1]=0$. Suppose that $\pi: Z\rightarrow X$ is a symplectic resolution. Let $\mathfrak{g}'=R[2]$ and let $G'$ be the simply connected Lie group with Lie algebra $\mathfrak{g}'$. The symplectic resolution conjecture. There exists a parabolic subgroup $P'$ of $G'$ such that $Z$ is isomorphic to $T^*(G'/P')$, and under this isomorphism the map $\pi$ becomes

$$T^*(G'/P')\rightarrow X.$$

The conjecture predicts that every symplectic resolution in the case $R[1]=0$ is a cotangent-bundle resolution associated with a parabolic subgroup of $G'$. The supplied status evidence indicates that the claim has been resolved; the source context discusses the classification of symplectic resolutions for coverings of nilpotent orbit closures.