Squashed 'frontend-plugin-core/' content from commit f499b54

git-subtree-dir: frontend-plugin-core
git-subtree-split: f499b54a28a1161f1d90d91c65f074e692e3b68f
Merge commit '9a59e864d649e457180b96145588e9d56330dbb0' as 'frontend-plugin-core'