title: how to MODIFY a constraint layout programmatically?
body: <p>Ive got a view like below :</p>
  
  <pre><code> &lt;org.rayanmehr.atlas.shared.customview.CustomTextView
      android:id="@+id/tvDownVoteCount"
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:layout_marginLeft="6dp"
      app:layout_constraintVertical_bias="0"
      app:layout_constraintTop_toBottomOf="@+id/anchorHelper"
      app:layout_constraintLeft_toRightOf="@+id/tvDownVoteIcon"
      app:layout_constraintBottom_toBottomOf="@+id/imgComment"
      /&gt;
  </code></pre>
  
  <p>how can i modify the value of <code>app:layout_constraintVertical_bias</code> or any other constraint property programmatically without having top set the whole set of the properties again in my activity ?</p>