https://source.android.com/ 
public interface android.location.GpsNavigationMessageEvent$Listener
  minor version: 0
  major version: 59
  flags: flags: (0x0601) ACC_PUBLIC, ACC_INTERFACE, ACC_ABSTRACT
  this_class: android.location.GpsNavigationMessageEvent$Listener
  super_class: java.lang.Object
{
  public abstract void onGpsNavigationMessageReceived(android.location.GpsNavigationMessageEvent);
    descriptor: (Landroid/location/GpsNavigationMessageEvent;)V
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    MethodParameters:
       Name  Flags
      event  

  public abstract void onStatusChanged(int);
    descriptor: (I)V
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    MethodParameters:
        Name  Flags
      status  
}
SourceFile: "GpsNavigationMessageEvent.java"
NestHost: android.location.GpsNavigationMessageEvent
InnerClasses:
  public abstract Listener = android.location.GpsNavigationMessageEvent$Listener of android.location.GpsNavigationMessageEvent
    RuntimeVisibleAnnotations: 
      android.annotation.SystemApi()