Kotlin 合成扩展和几个包含相同的布局

How to access to view using kotlin synthetic extension if I have a layout like below:

文件:Two_day_view.xml

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:orientation="vertical">

    <include
        android:id="@+id/day1"
        layout="@layout/day_row"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" />

    <include
        android:id="@+id/day2"
        layout="@layout/day_row"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" />
</LinearLayout>

文件:day_row.xml

   <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="vertical"       >

        <TextView
            android:id="@+id/dayName"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content" />

    </LinearLayout>

如何访问dayName？我找了一些这样的:

day1.dayName.text = "xxx"
day2.dayName.text = "sss"

我在Studio中看到我可以访问dayName，但dayName TextView指的是哪一个？

Normal if I have only one included layout it works fine. But now I have multiple times included same layout.

of course I can always do:

day1.findViewById(R.id.dayName).text = "xxx"

but I'm looking for nice solution. :)