Go 访问结构内声明的列表时发生类型断言错误

我创建了一个具有列表的结构，其中包含对相同结构类型的值的引用。我不熟悉go语言，无法找到一种方法来访问自动解析为上述结构类型的值。在java中类似于此：

 class Node{
    String value ;
    String key;
    List<Node> children = new ArrayList<Node>();
    public Node(String key, value) {
       // rest of the code follows
    }  
 }

class AccessNode {
 public static void main(String args[]) {
     Node node = new Node("key", "value");
      // The values automatically resolve to type Node.
     for(Node node : node.children) {
       // do something
     }
} 

现在，我迭代子节点并在任何时候返回一个节点，该节点的值与要比较的字符串部分匹配

func countMatchingChars(key string, node *Node) (int, *Node) {
    count := 0
    for e := node.childern.Front(); e != nil; e = e.Next() {
            // Getting error when accessing e.Value.key
            if c := MatchCount(e.Value.key, key); c > 0 {
                return c, e.Value
         }
    }}

我得到以下错误

./trie.go:53: e.Value.key undefined (type interface {} has no field or method key)
./trie.go:54: cannot use e.Value (type interface {}) as type *Node in return argument: need type assertion

---

我得到了解决方案，并在go中发现了接口：）

./trie.go:53: e.Value.key undefined (type interface {} has no field or method key)
./trie.go:54: cannot use e.Value (type interface {}) as type *Node in return argument: need type assertion

if c := MatchCount(e.Value.(*Node).key, key); c > 0 {
        return c, e.Value.(*Node)
    }