// This isn't actually accurate, but we force this cast here because the
// types for createUpdateDBOpsForThreadStoreThreadInfos assume they're
// converting from a client DB that contains RawThreadInfos. In fact, at
// this point the client DB contains ThinRawThreadInfoWithPermissions.
const stripMemberPermissions: RawThreadInfos => RawThreadInfos =
  (stripMemberPermissionsFromRawThreadInfos: any);