我正在圍繞數據存儲GetAll函數構建一個包裝器，我很難找到該函數返回非錯誤的位置。在我看來，除非有任何其他錯誤（即當它中斷時Done），否則它會返回errFieldMismatch我認為不正確的。func (q *Query) GetAll(c context.Context, dst interface{}) ([]*Key, error) {    var (        dv               reflect.Value        mat              multiArgType        elemType         reflect.Type        errFieldMismatch error    )    if !q.keysOnly {        dv = reflect.ValueOf(dst)        if dv.Kind() != reflect.Ptr || dv.IsNil() {            return nil, ErrInvalidEntityType        }        dv = dv.Elem()        mat, elemType = checkMultiArg(dv)        if mat == multiArgTypeInvalid || mat == multiArgTypeInterface {            return nil, ErrInvalidEntityType        }    }    var keys []*Key    for t := q.Run(c); ; {        k, e, err := t.next()        if err == Done {            break        }        if err != nil {            return keys, err        }        if !q.keysOnly {            ev := reflect.New(elemType)            if elemType.Kind() == reflect.Map {                // This is a special case. The zero values of a map type are                // not immediately useful; they have to be make'd.                //                // Funcs and channels are similar, in that a zero value is not useful,                // but even a freshly make'd channel isn't useful: there's no fixed                // channel buffer size that is always going to be large enough, and                // there's no goroutine to drain the other end. Theoretically, these                // types could be supported, for example by sniffing for a constructor                // method or requiring prior registration, but for now it's not a                // frequent enough concern to be worth it. Programmers can work around                // it by explicitly using Iterator.Next instead of the Query.GetAll                // convenience method.                x := reflect.MakeMap(elemType)                ev.Elem().Set(x)            }