Whether flag key is present in the page URL (or in search, for tests).
For the rare module-scope safety valve that has no options path to receive
UrlParams through (the worker pool's ?mainThreadCodecs, whose pool
is a lazily created singleton). Everything else takes the parsed snapshot.
Whether flag
keyis present in the page URL (or insearch, for tests).For the rare module-scope safety valve that has no options path to receive UrlParams through (the worker pool's
?mainThreadCodecs, whose pool is a lazily created singleton). Everything else takes the parsed snapshot.