@CanIgnoreReturnValue
  public synchronized AndroidKeysetManager delete(int keyId) throws GeneralSecurityException {
    keysetManager = keysetManager.delete(keyId);
    write(keysetManager.getKeysetHandle(), writer, masterAead);
    return this;
  }
Deletes the key with {@code keyId}.

@throws GeneralSecurityException if the key is not found or it is the primary key
java_src/src/main/java/com/google/crypto/tink/integration/android/AndroidKeysetManager.java