For each extension recorded in the object's @extensions slot (processed
innermost-first) whose installed package version is newer than the recorded
stamp (or whose stamp is missing), calls the extension's upgrade method if
one is registered, then records the installed version as the new stamp. The
core mizer upgrade is not run here; see upgrade.MizerParams().
runExtensionUpgrades(params)The object with extension migrations applied and stamps refreshed.
A MizerParams object.
Extension upgrade methods are looked up with
getS3method("upgrade", name, optional = TRUE), must perform only their own
migration, must be idempotent, and must not call NextMethod().