golang main 代码
文件路径：/test/typeparam/issue48337a.dir/main.go
/ Copyright 2021 The Go Authors. All rights reserved.
/ Use of this source code is governed by a BSD-style
/ license that can be found in the LICENSE file.
package main
import "./a"
func main() {
obj := a.NewWrapperWithLock("this file does import sync")
obj.PrintWithLock()
}