https://source.android.com/ 
public interface android.media.AudioRouting$OnRoutingChangedListener
  minor version: 0
  major version: 59
  flags: flags: (0x0601) ACC_PUBLIC, ACC_INTERFACE, ACC_ABSTRACT
  this_class: android.media.AudioRouting$OnRoutingChangedListener
  super_class: java.lang.Object
{
  public abstract void onRoutingChanged(android.media.AudioRouting);
    descriptor: (Landroid/media/AudioRouting;)V
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    MethodParameters:
        Name  Flags
      router  
}
SourceFile: "AudioRouting.java"
NestHost: android.media.AudioRouting
InnerClasses:
  public abstract OnRoutingChangedListener = android.media.AudioRouting$OnRoutingChangedListener of android.media.AudioRouting