RefCell and borrow() cause error[E0597]: borrowed value does not live long enough

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Here is the requested code (it's short so I included the whole thing). It doesn't specify any explicit lifetimes. Does that answer the lifetime question?

   293     /// Like jdbc's default, if you don't call begin/rollback/commit, sqlx will commit after every                            
   294     /// sql statement, but if you call begin/rollback/commit, it will let you manage                                          
   295     /// explicitly and will automatically turn autocommit on/off as needed to allow that. (???)                               
   296     fn begin_trans(&self) -> Result<Transaction<Postgres>, anyhow::Error> {                                                   
   297         let tx: Transaction<Postgres> = match self.rt.block_on(self.pool.begin()) {                                           
   298             Err(e) => return Err(anyhow!(e.to_string())),                                                                     
   299             Ok(t) => t,                                                                                                          300         };                                                                                                                    
   301         // %% see comments in fn connect() re this AND remove above method comment??                                          
   302         // connection.setAutoCommit(false);                                                                                      303         Ok(tx)                                                                                                                
   304     }

I plan to look at your suggestion thoughtfully and note here the result; thank you.