java/android/os/ext/api/current.txt

// Signature format: 6.0
// - style=java
package android.os.ext {

  public class SdkExtensions {
    method @NonNull public static java.util.Map<Integer, Integer> getAllExtensionVersions();
    method public static int getExtensionVersion(int);
    field public static final int AD_SERVICES = 1000000; // 0xf4240
  }

}