How to throw an error from inTransaction block in FMDB framework

[Orkhan Alizada]

Is it possible to throw an error inside of the inTransaction block? Like:

self.queue!.inTransaction { db, rollback in 

 do { 

 let rs = try db.executeQuery(some_query_here, values: nil) 

 while rs.next() { // do smth here } 

 rs.close() 

 }  catch { 

 rollback.pointee = true 

 // THROW ERROR HERE

 }

 }

So basically I want to throw an error in catch block. But unfortunately inTransaction method is not throwable. Can I do something here?

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