golang b 代码
文件路径：/test/typeparam/mutualimp.dir/b.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 b
import "./a"
func H() {
a.F[a.X, a.X]()
a.G()
}