<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical" >

    <include layout="@layout/toolbar"/>

    <androidx.fragment.app.FragmentContainerView
        android:id="@+id/message_headers_fragment"
        android:layout_width="match_parent"
        android:layout_height="match_parent" />
</LinearLayout>
