I have been learning google samples. In one of the source codes I cam across this code:
<layout
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"
tools:targetApi="o"
tools:ignore="RtlSymmetry">
...
</layout>
What tools:ignore="RtlSymmetry does?