mdx:story multiple children

Build 18842 on fix/addon-docs/fixed-position
Reviewing disabled
View latest build
BaselineBuild 17182 on tech/add-dual-theme-rendering
View Storybook
LatestBuild 18842 on fix/addon-docs/fixed-position
View Storybook
Baseline History
Build 1884292ca7f0
Current build. There are unaccepted changes, so build 17182 is still the baseline.
Build 171825c83b59 current baseline
Accepted by Norbert de Langen.
Build 171752b6e39f
Accepted by Norbert de Langen.
Build 161438a882e9
Accepted by Michael Shilman.
Commenting is disabled because there's a newer build on this branch
Go to Build 18843 now