golang foo 代码
文件路径：/test/fixedbugs/issue44732.dir/foo/foo.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 foo
type Foo struct {
updatecb func()
}
func NewFoo() *Foo {
return &Foo{updatecb: nil}
}