https://source.android.com/ 
class android.companion.CompanionDeviceManager$CallbackProxy extends android.companion.IFindDeviceCallback$Stub implements android.app.Application$ActivityLifecycleCallbacks
  minor version: 0
  major version: 59
  flags: flags: (0x0020) ACC_SUPER
  this_class: android.companion.CompanionDeviceManager$CallbackProxy
  super_class: android.companion.IFindDeviceCallback$Stub
{
  private android.companion.CompanionDeviceManager$Callback mCallback;
    descriptor: Landroid/companion/CompanionDeviceManager$Callback;
    flags: (0x0002) ACC_PRIVATE

  private android.os.Handler mHandler;
    descriptor: Landroid/os/Handler;
    flags: (0x0002) ACC_PRIVATE

  private android.companion.AssociationRequest mRequest;
    descriptor: Landroid/companion/AssociationRequest;
    flags: (0x0002) ACC_PRIVATE

  final java.lang.Object mLock;
    descriptor: Ljava/lang/Object;
    flags: (0x0010) ACC_FINAL

  final android.companion.CompanionDeviceManager this$0;
    descriptor: Landroid/companion/CompanionDeviceManager;
    flags: (0x1010) ACC_FINAL, ACC_SYNTHETIC

  private void <init>(android.companion.CompanionDeviceManager, android.companion.AssociationRequest, android.companion.CompanionDeviceManager$Callback, android.os.Handler);
    descriptor: (Landroid/companion/CompanionDeviceManager;Landroid/companion/AssociationRequest;Landroid/companion/CompanionDeviceManager$Callback;Landroid/os/Handler;)V
    flags: (0x0002) ACC_PRIVATE
    Code:
      stack=3, locals=5, args_size=5
        start local 0 // android.companion.CompanionDeviceManager$CallbackProxy this
        start local 2 // android.companion.AssociationRequest request
        start local 3 // android.companion.CompanionDeviceManager$Callback callback
        start local 4 // android.os.Handler handler
         0: .line 277
            aload 0 /* this */
            aload 1
            putfield android.companion.CompanionDeviceManager$CallbackProxy.this$0:Landroid/companion/CompanionDeviceManager;
            aload 0 /* this */
            invokespecial android.companion.IFindDeviceCallback$Stub.<init>:()V
         1: .line 275
            aload 0 /* this */
            new java.lang.Object
            dup
            invokespecial java.lang.Object.<init>:()V
            putfield android.companion.CompanionDeviceManager$CallbackProxy.mLock:Ljava/lang/Object;
         2: .line 278
            aload 0 /* this */
            aload 3 /* callback */
            putfield android.companion.CompanionDeviceManager$CallbackProxy.mCallback:Landroid/companion/CompanionDeviceManager$Callback;
         3: .line 279
            aload 0 /* this */
            aload 4 /* handler */
            putfield android.companion.CompanionDeviceManager$CallbackProxy.mHandler:Landroid/os/Handler;
         4: .line 280
            aload 0 /* this */
            aload 2 /* request */
            putfield android.companion.CompanionDeviceManager$CallbackProxy.mRequest:Landroid/companion/AssociationRequest;
         5: .line 281
            aload 1
            invokevirtual android.companion.CompanionDeviceManager.getActivity:()Landroid/app/Activity;
            invokevirtual android.app.Activity.getApplication:()Landroid/app/Application;
            aload 0 /* this */
            invokevirtual android.app.Application.registerActivityLifecycleCallbacks:(Landroid/app/Application$ActivityLifecycleCallbacks;)V
         6: .line 282
            return
        end local 4 // android.os.Handler handler
        end local 3 // android.companion.CompanionDeviceManager$Callback callback
        end local 2 // android.companion.AssociationRequest request
        end local 0 // android.companion.CompanionDeviceManager$CallbackProxy this
      LocalVariableTable:
        Start  End  Slot      Name  Signature
            0    7     0      this  Landroid/companion/CompanionDeviceManager$CallbackProxy;
            0    7     2   request  Landroid/companion/AssociationRequest;
            0    7     3  callback  Landroid/companion/CompanionDeviceManager$Callback;
            0    7     4   handler  Landroid/os/Handler;
    MethodParameters:
          Name  Flags
      this$0    final
      request   
      callback  
      handler   

  public void onSuccess(android.app.PendingIntent);
    descriptor: (Landroid/app/PendingIntent;)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=3, locals=2, args_size=2
        start local 0 // android.companion.CompanionDeviceManager$CallbackProxy this
        start local 1 // android.app.PendingIntent launcher
         0: .line 286
            aload 0 /* this */
            invokedynamic accept()Ljava/util/function/BiConsumer;
              Bootstrap: invokestatic java.lang.invoke.LambdaMetafactory.metafactory:(Ljava/lang/invoke/MethodHandles$Lookup;Ljava/lang/String;Ljava/lang/invoke/MethodType;Ljava/lang/invoke/MethodType;Ljava/lang/invoke/MethodHandle;Ljava/lang/invoke/MethodType;)Ljava/lang/invoke/CallSite;
                Method arguments:
                  (Ljava/lang/Object;Ljava/lang/Object;)V
                  android/companion/CompanionDeviceManager$Callback.onDeviceFound(Landroid/content/IntentSender;)V (5)
                  (Landroid/companion/CompanionDeviceManager$Callback;Landroid/content/IntentSender;)V
            aload 1 /* launcher */
            invokevirtual android.app.PendingIntent.getIntentSender:()Landroid/content/IntentSender;
            invokevirtual android.companion.CompanionDeviceManager$CallbackProxy.lockAndPost:(Ljava/util/function/BiConsumer;Ljava/lang/Object;)V
         1: .line 287
            return
        end local 1 // android.app.PendingIntent launcher
        end local 0 // android.companion.CompanionDeviceManager$CallbackProxy this
      LocalVariableTable:
        Start  End  Slot      Name  Signature
            0    2     0      this  Landroid/companion/CompanionDeviceManager$CallbackProxy;
            0    2     1  launcher  Landroid/app/PendingIntent;
    MethodParameters:
          Name  Flags
      launcher  

  public void onFailure(java.lang.CharSequence);
    descriptor: (Ljava/lang/CharSequence;)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=3, locals=2, args_size=2
        start local 0 // android.companion.CompanionDeviceManager$CallbackProxy this
        start local 1 // java.lang.CharSequence reason
         0: .line 291
            aload 0 /* this */
            invokedynamic accept()Ljava/util/function/BiConsumer;
              Bootstrap: invokestatic java.lang.invoke.LambdaMetafactory.metafactory:(Ljava/lang/invoke/MethodHandles$Lookup;Ljava/lang/String;Ljava/lang/invoke/MethodType;Ljava/lang/invoke/MethodType;Ljava/lang/invoke/MethodHandle;Ljava/lang/invoke/MethodType;)Ljava/lang/invoke/CallSite;
                Method arguments:
                  (Ljava/lang/Object;Ljava/lang/Object;)V
                  android/companion/CompanionDeviceManager$Callback.onFailure(Ljava/lang/CharSequence;)V (5)
                  (Landroid/companion/CompanionDeviceManager$Callback;Ljava/lang/CharSequence;)V
            aload 1 /* reason */
            invokevirtual android.companion.CompanionDeviceManager$CallbackProxy.lockAndPost:(Ljava/util/function/BiConsumer;Ljava/lang/Object;)V
         1: .line 292
            return
        end local 1 // java.lang.CharSequence reason
        end local 0 // android.companion.CompanionDeviceManager$CallbackProxy this
      LocalVariableTable:
        Start  End  Slot    Name  Signature
            0    2     0    this  Landroid/companion/CompanionDeviceManager$CallbackProxy;
            0    2     1  reason  Ljava/lang/CharSequence;
    MethodParameters:
        Name  Flags
      reason  

  <T> void lockAndPost(java.util.function.BiConsumer<android.companion.CompanionDeviceManager$Callback, T>, );
    descriptor: (Ljava/util/function/BiConsumer;Ljava/lang/Object;)V
    flags: (0x0000) 
    Code:
      stack=4, locals=4, args_size=3
        start local 0 // android.companion.CompanionDeviceManager$CallbackProxy this
        start local 1 // java.util.function.BiConsumer action
        start local 2 // java.lang.Object payload
         0: .line 295
            aload 0 /* this */
            getfield android.companion.CompanionDeviceManager$CallbackProxy.mLock:Ljava/lang/Object;
            dup
            astore 3
            monitorenter
         1: .line 296
            aload 0 /* this */
            getfield android.companion.CompanionDeviceManager$CallbackProxy.mHandler:Landroid/os/Handler;
            ifnull 3
         2: .line 297
            aload 0 /* this */
            getfield android.companion.CompanionDeviceManager$CallbackProxy.mHandler:Landroid/os/Handler;
            aload 0 /* this */
            aload 1 /* action */
            aload 2 /* payload */
            invokedynamic run(Landroid/companion/CompanionDeviceManager$CallbackProxy;Ljava/util/function/BiConsumer;Ljava/lang/Object;)Ljava/lang/Runnable;
              Bootstrap: invokestatic java.lang.invoke.LambdaMetafactory.metafactory:(Ljava/lang/invoke/MethodHandles$Lookup;Ljava/lang/String;Ljava/lang/invoke/MethodType;Ljava/lang/invoke/MethodType;Ljava/lang/invoke/MethodHandle;Ljava/lang/invoke/MethodType;)Ljava/lang/invoke/CallSite;
                Method arguments:
                  ()V
                  android/companion/CompanionDeviceManager$CallbackProxy.lambda$2(Ljava/util/function/BiConsumer;Ljava/lang/Object;)V (7)
                  ()V
            invokevirtual android.os.Handler.post:(Ljava/lang/Runnable;)Z
            pop
         3: .line 295
      StackMap locals: java.lang.Object
      StackMap stack:
            aload 3
            monitorexit
         4: goto 7
      StackMap locals:
      StackMap stack: java.lang.Throwable
         5: aload 3
            monitorexit
         6: athrow
         7: .line 308
      StackMap locals:
      StackMap stack:
            return
        end local 2 // java.lang.Object payload
        end local 1 // java.util.function.BiConsumer action
        end local 0 // android.companion.CompanionDeviceManager$CallbackProxy this
      LocalVariableTable:
        Start  End  Slot     Name  Signature
            0    8     0     this  Landroid/companion/CompanionDeviceManager$CallbackProxy;
            0    8     1   action  Ljava/util/function/BiConsumer<Landroid/companion/CompanionDeviceManager$Callback;TT;>;
            0    8     2  payload  TT;
      Exception table:
        from    to  target  type
           1     4       5  any
           5     6       5  any
    Signature: <T:Ljava/lang/Object;>(Ljava/util/function/BiConsumer<Landroid/companion/CompanionDeviceManager$Callback;TT;>;TT;)V
    MethodParameters:
         Name  Flags
      action   
      payload  

  public void onActivityDestroyed(android.app.Activity);
    descriptor: (Landroid/app/Activity;)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=4, locals=4, args_size=2
        start local 0 // android.companion.CompanionDeviceManager$CallbackProxy this
        start local 1 // android.app.Activity activity
         0: .line 312
            aload 0 /* this */
            getfield android.companion.CompanionDeviceManager$CallbackProxy.mLock:Ljava/lang/Object;
            dup
            astore 2
            monitorenter
         1: .line 313
            aload 1 /* activity */
            aload 0 /* this */
            getfield android.companion.CompanionDeviceManager$CallbackProxy.this$0:Landroid/companion/CompanionDeviceManager;
            invokevirtual android.companion.CompanionDeviceManager.getActivity:()Landroid/app/Activity;
            if_acmpeq 3
            aload 2
            monitorexit
         2: return
         3: .line 315
      StackMap locals: java.lang.Object
      StackMap stack:
            aload 0 /* this */
            getfield android.companion.CompanionDeviceManager$CallbackProxy.this$0:Landroid/companion/CompanionDeviceManager;
            getfield android.companion.CompanionDeviceManager.mService:Landroid/companion/ICompanionDeviceManager;
            aload 0 /* this */
            getfield android.companion.CompanionDeviceManager$CallbackProxy.mRequest:Landroid/companion/AssociationRequest;
            aload 0 /* this */
            aload 0 /* this */
            getfield android.companion.CompanionDeviceManager$CallbackProxy.this$0:Landroid/companion/CompanionDeviceManager;
            invokevirtual android.companion.CompanionDeviceManager.getCallingPackage:()Ljava/lang/String;
            invokeinterface android.companion.ICompanionDeviceManager.stopScan:(Landroid/companion/AssociationRequest;Landroid/companion/IFindDeviceCallback;Ljava/lang/String;)V
         4: .line 316
            goto 7
      StackMap locals:
      StackMap stack: android.os.RemoteException
         5: astore 3 /* e */
        start local 3 // android.os.RemoteException e
         6: .line 317
            aload 3 /* e */
            invokevirtual android.os.RemoteException.rethrowFromSystemServer:()Ljava/lang/RuntimeException;
            pop
        end local 3 // android.os.RemoteException e
         7: .line 319
      StackMap locals:
      StackMap stack:
            aload 0 /* this */
            getfield android.companion.CompanionDeviceManager$CallbackProxy.this$0:Landroid/companion/CompanionDeviceManager;
            invokevirtual android.companion.CompanionDeviceManager.getActivity:()Landroid/app/Activity;
            invokevirtual android.app.Activity.getApplication:()Landroid/app/Application;
            aload 0 /* this */
            invokevirtual android.app.Application.unregisterActivityLifecycleCallbacks:(Landroid/app/Application$ActivityLifecycleCallbacks;)V
         8: .line 320
            aload 0 /* this */
            aconst_null
            putfield android.companion.CompanionDeviceManager$CallbackProxy.mCallback:Landroid/companion/CompanionDeviceManager$Callback;
         9: .line 321
            aload 0 /* this */
            aconst_null
            putfield android.companion.CompanionDeviceManager$CallbackProxy.mHandler:Landroid/os/Handler;
        10: .line 322
            aload 0 /* this */
            aconst_null
            putfield android.companion.CompanionDeviceManager$CallbackProxy.mRequest:Landroid/companion/AssociationRequest;
        11: .line 312
            aload 2
            monitorexit
        12: goto 15
      StackMap locals:
      StackMap stack: java.lang.Throwable
        13: aload 2
            monitorexit
        14: athrow
        15: .line 324
      StackMap locals:
      StackMap stack:
            return
        end local 1 // android.app.Activity activity
        end local 0 // android.companion.CompanionDeviceManager$CallbackProxy this
      LocalVariableTable:
        Start  End  Slot      Name  Signature
            0   16     0      this  Landroid/companion/CompanionDeviceManager$CallbackProxy;
            0   16     1  activity  Landroid/app/Activity;
            6    7     3         e  Landroid/os/RemoteException;
      Exception table:
        from    to  target  type
           3     4       5  Class android.os.RemoteException
           1     2      13  any
           3    12      13  any
          13    14      13  any
    MethodParameters:
          Name  Flags
      activity  

  public void onActivityCreated(android.app.Activity, android.os.Bundle);
    descriptor: (Landroid/app/Activity;Landroid/os/Bundle;)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=0, locals=3, args_size=3
        start local 0 // android.companion.CompanionDeviceManager$CallbackProxy this
        start local 1 // android.app.Activity activity
        start local 2 // android.os.Bundle savedInstanceState
         0: .line 326
            return
        end local 2 // android.os.Bundle savedInstanceState
        end local 1 // android.app.Activity activity
        end local 0 // android.companion.CompanionDeviceManager$CallbackProxy this
      LocalVariableTable:
        Start  End  Slot                Name  Signature
            0    1     0                this  Landroid/companion/CompanionDeviceManager$CallbackProxy;
            0    1     1            activity  Landroid/app/Activity;
            0    1     2  savedInstanceState  Landroid/os/Bundle;
    MethodParameters:
                    Name  Flags
      activity            
      savedInstanceState  

  public void onActivityStarted(android.app.Activity);
    descriptor: (Landroid/app/Activity;)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=0, locals=2, args_size=2
        start local 0 // android.companion.CompanionDeviceManager$CallbackProxy this
        start local 1 // android.app.Activity activity
         0: .line 327
            return
        end local 1 // android.app.Activity activity
        end local 0 // android.companion.CompanionDeviceManager$CallbackProxy this
      LocalVariableTable:
        Start  End  Slot      Name  Signature
            0    1     0      this  Landroid/companion/CompanionDeviceManager$CallbackProxy;
            0    1     1  activity  Landroid/app/Activity;
    MethodParameters:
          Name  Flags
      activity  

  public void onActivityResumed(android.app.Activity);
    descriptor: (Landroid/app/Activity;)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=0, locals=2, args_size=2
        start local 0 // android.companion.CompanionDeviceManager$CallbackProxy this
        start local 1 // android.app.Activity activity
         0: .line 328
            return
        end local 1 // android.app.Activity activity
        end local 0 // android.companion.CompanionDeviceManager$CallbackProxy this
      LocalVariableTable:
        Start  End  Slot      Name  Signature
            0    1     0      this  Landroid/companion/CompanionDeviceManager$CallbackProxy;
            0    1     1  activity  Landroid/app/Activity;
    MethodParameters:
          Name  Flags
      activity  

  public void onActivityPaused(android.app.Activity);
    descriptor: (Landroid/app/Activity;)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=0, locals=2, args_size=2
        start local 0 // android.companion.CompanionDeviceManager$CallbackProxy this
        start local 1 // android.app.Activity activity
         0: .line 329
            return
        end local 1 // android.app.Activity activity
        end local 0 // android.companion.CompanionDeviceManager$CallbackProxy this
      LocalVariableTable:
        Start  End  Slot      Name  Signature
            0    1     0      this  Landroid/companion/CompanionDeviceManager$CallbackProxy;
            0    1     1  activity  Landroid/app/Activity;
    MethodParameters:
          Name  Flags
      activity  

  public void onActivityStopped(android.app.Activity);
    descriptor: (Landroid/app/Activity;)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=0, locals=2, args_size=2
        start local 0 // android.companion.CompanionDeviceManager$CallbackProxy this
        start local 1 // android.app.Activity activity
         0: .line 330
            return
        end local 1 // android.app.Activity activity
        end local 0 // android.companion.CompanionDeviceManager$CallbackProxy this
      LocalVariableTable:
        Start  End  Slot      Name  Signature
            0    1     0      this  Landroid/companion/CompanionDeviceManager$CallbackProxy;
            0    1     1  activity  Landroid/app/Activity;
    MethodParameters:
          Name  Flags
      activity  

  public void onActivitySaveInstanceState(android.app.Activity, android.os.Bundle);
    descriptor: (Landroid/app/Activity;Landroid/os/Bundle;)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=0, locals=3, args_size=3
        start local 0 // android.companion.CompanionDeviceManager$CallbackProxy this
        start local 1 // android.app.Activity activity
        start local 2 // android.os.Bundle outState
         0: .line 331
            return
        end local 2 // android.os.Bundle outState
        end local 1 // android.app.Activity activity
        end local 0 // android.companion.CompanionDeviceManager$CallbackProxy this
      LocalVariableTable:
        Start  End  Slot      Name  Signature
            0    1     0      this  Landroid/companion/CompanionDeviceManager$CallbackProxy;
            0    1     1  activity  Landroid/app/Activity;
            0    1     2  outState  Landroid/os/Bundle;
    MethodParameters:
          Name  Flags
      activity  
      outState  

  private void lambda$2(java.util.function.BiConsumer, java.lang.Object);
    descriptor: (Ljava/util/function/BiConsumer;Ljava/lang/Object;)V
    flags: (0x1002) ACC_PRIVATE, ACC_SYNTHETIC
    Code:
      stack=3, locals=5, args_size=3
        start local 0 // android.companion.CompanionDeviceManager$CallbackProxy this
         0: .line 298
            aconst_null
            astore 3 /* callback */
        start local 3 // android.companion.CompanionDeviceManager$Callback callback
         1: .line 299
            aload 0 /* this */
            getfield android.companion.CompanionDeviceManager$CallbackProxy.mLock:Ljava/lang/Object;
            dup
            astore 4
            monitorenter
         2: .line 300
            aload 0 /* this */
            getfield android.companion.CompanionDeviceManager$CallbackProxy.mCallback:Landroid/companion/CompanionDeviceManager$Callback;
            astore 3 /* callback */
         3: .line 299
            aload 4
            monitorexit
         4: goto 7
      StackMap locals: android.companion.CompanionDeviceManager$CallbackProxy java.util.function.BiConsumer java.lang.Object android.companion.CompanionDeviceManager$Callback java.lang.Object
      StackMap stack: java.lang.Throwable
         5: aload 4
            monitorexit
         6: athrow
         7: .line 302
      StackMap locals:
      StackMap stack:
            aload 3 /* callback */
            ifnull 9
         8: .line 303
            aload 1
            aload 3 /* callback */
            aload 2
            invokeinterface java.util.function.BiConsumer.accept:(Ljava/lang/Object;Ljava/lang/Object;)V
        end local 3 // android.companion.CompanionDeviceManager$Callback callback
         9: .line 305
      StackMap locals:
      StackMap stack:
            return
        end local 0 // android.companion.CompanionDeviceManager$CallbackProxy this
      LocalVariableTable:
        Start  End  Slot      Name  Signature
            0   10     0      this  Landroid/companion/CompanionDeviceManager$CallbackProxy;
            1    9     3  callback  Landroid/companion/CompanionDeviceManager$Callback;
      Exception table:
        from    to  target  type
           2     4       5  any
           5     6       5  any
}
SourceFile: "CompanionDeviceManager.java"
NestHost: android.companion.CompanionDeviceManager
InnerClasses:
  public abstract ActivityLifecycleCallbacks = android.app.Application$ActivityLifecycleCallbacks of android.app.Application
  public abstract Callback = android.companion.CompanionDeviceManager$Callback of android.companion.CompanionDeviceManager
  private CallbackProxy = android.companion.CompanionDeviceManager$CallbackProxy of android.companion.CompanionDeviceManager
  public abstract Stub = android.companion.IFindDeviceCallback$Stub of android.companion.IFindDeviceCallback
  public final Lookup = java.lang.invoke.MethodHandles$Lookup of java.lang.invoke.MethodHandles