ObjectSpace :: readTransactionLevel - Read transaction level
The function returns the current nesting level of read transactions. Read transactions are usually created by the system. When being created by the application, the application has to close read transactions properly. Otherwise, events are not submitted anymore and the application may react in an unexpected way.
Return value: Transaction level ( int32 )
The transaction level identifies a transaction within a hierarchy of nested transactions. The out most transaction starts with number 1.