sampleDomain.withOptimisticLocking(modificationBaseVersion, [errorBinding: true]) { Object domain ->
    // Operations which might causes OptimisticLockingFailureException.
    // Here is invoked only when a version of modification base < current persistent version.
}.onConflict { Object domain, Throwable caused ->
    // Operations to handle a failure of optimistic locking
    // e.g. to render edit page to re-input
}