https://source.android.com/ 
public interface android.hardware.biometrics.BiometricAuthenticator
  minor version: 0
  major version: 59
  flags: flags: (0x0601) ACC_PUBLIC, ACC_INTERFACE, ACC_ABSTRACT
  this_class: android.hardware.biometrics.BiometricAuthenticator
  super_class: java.lang.Object
{
  public abstract void authenticate(android.hardware.biometrics.CryptoObject, android.os.CancellationSignal, java.util.concurrent.Executor, android.hardware.biometrics.BiometricAuthenticator$AuthenticationCallback);
    descriptor: (Landroid/hardware/biometrics/CryptoObject;Landroid/os/CancellationSignal;Ljava/util/concurrent/Executor;Landroid/hardware/biometrics/BiometricAuthenticator$AuthenticationCallback;)V
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    MethodParameters:
          Name  Flags
      crypto    
      cancel    
      executor  
      callback  

  public abstract void authenticate(android.os.CancellationSignal, java.util.concurrent.Executor, android.hardware.biometrics.BiometricAuthenticator$AuthenticationCallback);
    descriptor: (Landroid/os/CancellationSignal;Ljava/util/concurrent/Executor;Landroid/hardware/biometrics/BiometricAuthenticator$AuthenticationCallback;)V
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    MethodParameters:
          Name  Flags
      cancel    
      executor  
      callback  
}
SourceFile: "BiometricAuthenticator.java"
NestMembers:
  android.hardware.biometrics.BiometricAuthenticator$AuthenticationCallback  android.hardware.biometrics.BiometricAuthenticator$AuthenticationResult  android.hardware.biometrics.BiometricAuthenticator$BiometricIdentifier
InnerClasses:
  public abstract AuthenticationCallback = android.hardware.biometrics.BiometricAuthenticator$AuthenticationCallback of android.hardware.biometrics.BiometricAuthenticator
  public AuthenticationResult = android.hardware.biometrics.BiometricAuthenticator$AuthenticationResult of android.hardware.biometrics.BiometricAuthenticator
  public abstract BiometricIdentifier = android.hardware.biometrics.BiometricAuthenticator$BiometricIdentifier of android.hardware.biometrics.BiometricAuthenticator