kubernetes/vendor/go.etcd.io/etcd/server/v3/etcdserver/api/membership/storev2.go

// IsMetaStoreOnly verifies if the given `store` contains only
// a meta-information (members, version) that can be recovered from the
// backend (storev3) as well as opposed to user-data.
func IsMetaStoreOnly(store v2store.Store) (bool, error) { … }