有一個接口注釋必須實現才能被包功能訪問。盡管實現接口，然后創建 CommentTest 對象的切片，但將注釋作為項類型，會使 Title 公共屬性未定義。PS：在這種情況下，串焊器工作正常。有沒有辦法讓它在沒有類型斷言的情況下工作？package mainimport "fmt"type Comment interface {    SetChild(Comment)    GetChildren() []Comment    GetID() int    GetParentID() int}type CommentTest struct {    Title string    ID int    ParentID int    Children []Comment}func (ct *CommentTest) SetChild(c Comment) {    ct.Children = append(ct.Children, c)}func (ct CommentTest) GetChildren() []Comment {    return ct.Children}func (ct CommentTest) GetID() int {    return ct.ID}func (ct CommentTest) GetParentID() int {    return ct.ParentID}// works well, all public properties are 100% accesiblefunc (ct CommentTest) String() string {    return "{ID: " + strconv.Itoa(ct.ID) + ", ParentID: " + strconv.Itoa(ct.ParentID) + ", Title: " + ct.Title + "}"}/*    There are test comments with this structure:        1 ->            2 ->                4            3 ->                5 */func testData() (Comment, []Comment) {    var plain []Comment    root := &CommentTest{ID: 1, ParentID: 3, Title: "Test 1"} // ParentID 3 -> Check for infinite recursion    plain = append(plain, root)    plain = append(plain, &CommentTest{ID: 2, ParentID: 1, Title: "Test 2"})    plain = append(plain, &CommentTest{ID: 3, ParentID: 1, Title: "Test 3"})    plain = append(plain, &CommentTest{ID: 4, ParentID: 2, Title: "Test 4"})    plain = append(plain, &CommentTest{ID: 5, ParentID: 3, Title: "Test 5"})    return root, plain}func main() {    root, plain := testData()    fmt.Println(root) // works well    root.Title //root.Title undefined (type Comment has no field or method Title)}