android13/packages/modules/SdkExtensions/java/android/os/ext/api/current.txt

// Signature format: 2.0
package android.os.ext {

  public class SdkExtensions {
    method @NonNull public static java.util.Map<java.lang.Integer,java.lang.Integer> getAllExtensionVersions();
    method public static int getExtensionVersion(int);
  }

}