func (db *PreparedStmtDB) Close() {
	db.Mux.Lock()
	defer db.Mux.Unlock()

	for _, stmt := range db.Stmts {
		go func(s *Stmt) {
			// make sure the stmt must finish preparation first
			<-s.prepared
			if s.Stmt != nil {
				_ = s.Close()
			}
		}(stmt)
	}
	// setting db.Stmts to nil to avoid further using
	db.Stmts = nil
}

func (sdb *PreparedStmtDB) Reset() {
	sdb.Mux.Lock()
	defer sdb.Mux.Unlock()

			var result User
			tx.First(&result)
			wg.Done()
		}()
	}
	wg.Wait()

	conn, ok := tx.ConnPool.(*gorm.PreparedStmtDB)
	AssertEqual(t, ok, true)
	AssertEqual(t, len(conn.Stmts), 2)
	for _, stmt := range conn.Stmts {
		if stmt == nil {
			t.Fatalf("stmt cannot bee nil")
		}
	}

	AssertEqual(t, sqlDB.Stats().InUse, 0)
}

func TestPreparedStmtInTransaction(t *testing.T) {

				Tx:             t,
				PreparedStmtDB: preparedStmt,
			}
		default:
			tx.Statement.ConnPool = &PreparedStmtDB{
				ConnPool: db.Config.ConnPool,
				Mux:      preparedStmt.Mux,
				Stmts:    preparedStmt.Stmts,
			}
		}
		txConfig.ConnPool = tx.Statement.ConnPool
		txConfig.PrepareStmt = true
	}

	if config.SkipHooks {
		tx.Statement.SkipHooks = true
	}

pkg testing, type CoverBlock struct, Col1 uint16
pkg testing, type CoverBlock struct, Line0 uint32
pkg testing, type CoverBlock struct, Line1 uint32
pkg testing, type CoverBlock struct, Stmts uint16
pkg testing, type TB interface, Error(...interface{})
pkg testing, type TB interface, Errorf(string, ...interface{})
pkg testing, type TB interface, Fail()
pkg testing, type TB interface, FailNow()