Align one view's edge to another view's center in Android's ConstraintLayout

align_to_center.xml

<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <Button
        android:id="@+id/target"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginStart="32dp"
        android:text="TargetView"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        tools:ignore="HardcodedText" />

    <Button
        android:id="@+id/view_to_align"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginBottom="64dp"
        android:text="View to left align to target's center"
        app:layout_constraintBottom_toTopOf="@+id/target"
        app:layout_constraintLeft_toRightOf="@+id/dummy_view"
        tools:ignore="HardcodedText" />

    <Button
        android:id="@+id/dummy_view"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Dummy view"
        android:visibility="gone"
        app:layout_constraintLeft_toLeftOf="@+id/target"
        app:layout_constraintRight_toRightOf="@+id/target"
        app:layout_constraintTop_toTopOf="parent"
        tools:ignore="HardcodedText"
        tools:layout_editor_absoluteY="234dp" />
    
</android.support.constraint.ConstraintLayout>