getNewIdent := ast.NewIdent
	if addPosition {
		getNewIdent = func(newName string) *ast.Ident {
			mangledIdent := ast.NewIdent(newName)
			if len(newName) == len(r.Name.Go) {
				return mangledIdent
			}
			p := fset.Position((*r.Expr).End())
			if p.Column == 0 {
				return mangledIdent
			}
			return ast.NewIdent(fmt.Sprintf("%s /*line :%d:%d*/", newName, p.Line, p.Column))

pkg go/ast, func Inspect(Node, func(Node) bool)
pkg go/ast, func IsExported(string) bool
pkg go/ast, func MergePackageFiles(*Package, MergeMode) *File
pkg go/ast, func NewIdent(string) *Ident
pkg go/ast, func NewObj(ObjKind, string) *Object
pkg go/ast, func NewPackage(*token.FileSet, map[string]*File, Importer, *Scope) (*Package, error)
pkg go/ast, func NewScope(*Scope) *Scope