Function pallet_tenancy::storage::transactional::with_transaction   
pub fn with_transaction<T, E, F>(f: F) -> Result<T, E>where
    E: From<DispatchError>,
    F: FnOnce() -> TransactionOutcome<Result<T, E>>,Expand description
Execute the supplied function in a new storage transaction.
All changes to storage performed by the supplied function are discarded if the returned
outcome is TransactionOutcome::Rollback.
Transactions can be nested up to TRANSACTIONAL_LIMIT times; more than that will result in an
error.
Commits happen to the parent transaction.