Expandable textview. How do I make it collapse to 2 lines, instead of 0 lines?

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Expandable textview. How do I make it collapse to 2 lines, instead of 0 lines?
Here is the library I am using.
I am able to expand my textview and minimize it. However, it minimizes fully. I just want to minimize it to 2 lines.
I have checked the github samples, but it looks like they use 2 textviews and toggle their visibility. I would like to avoid that. Here is the code and xml.
Here is my xml
<com.github.aakira.expandablelayout.ExpandableRelativeLayout
android:id="@+id/expandable_opening_hours"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginEnd="16dp"
android:layout_marginRight="16dp"
android:layout_marginTop="4dp"
app:ael_duration="500"
app:ael_expanded="true"
app:ael_interpolator="accelerate"
app:ael_orientation="vertical"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="@+id/textView6"
app:layout_constraintTop_toBottomOf="@+id/textView6">
<TextView
android:id="@+id/openingTextView"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:textColor="@color/medium_grey"
android:textSize="@dimen/text_size_12"
tools:text="Weekdays 7am - 9:30pm; nWeekend 7:30am - 8pm; PH Closed" />
</com.github.aakira.expandablelayout.ExpandableRelativeLayout>
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