The VersionContext::getOperationFCV() method returns the FCV associated an operation as a FCVSnapshot. This method is intended to be used in the FCV-gated feature flag implementation to implement operation FCV checking, but it may cause confusion with the second argument to FCVGatedFeatureFlag::isEnabled(VersionContext&, FCVSnapshot), which is not operation FCV but rather the global FCV.

This ticket is for making VersionContext::getOperationFCV() callable only from within FCVGatedFeatureFlag and ShardingDDLCoordinator along with a short note in version_context.h for why this method should not be called from other code.