We are working on a fully composable frame and concurrency is done as follows (upper-case = Object, lower-case = property):

AsyncRun ( part SomeObject )

multiple items can run in parallel like this:

AsyncRun ( part SomeObjectA SomeObjectB .. )

synchronization:

AsyncSync ( part AsyncRun ( part SomeObjectA SomeObjectB .. ))

locking a property:

AsyncRun ( part AsyncLock ( lockName = "someName", part = SaveUser ( ... ) ) )

On main thread (for UI/UX):

MainThreadRun ( part SomeObject )