}

func gotypes(f *ast.File) bool {
	fixed := fixGoTypes(f)
	if fixGoExact(f) {
		fixed = true
	}
	return fixed
}

func fixGoTypes(f *ast.File) bool {
	return rewriteImport(f, "golang.org/x/tools/go/types", "go/types")
}

func fixGoExact(f *ast.File) bool {
	// This one is harder because the import name changes.
	// First find the import spec.