@Nullable
    public String getValue() {
      return mValue;
    }
These roles are defined by Google's TalkBack screen reader, and this list should be kept up to
date with their implementation. Details can be seen in their source code here:

<p>https://github.com/google/talkback/blob/master/utils/src/main/java/Role.java
core/src/main/java/com/facebook/testing/screenshot/layouthierarchy/AccessibilityUtil.java