@Override
  public boolean equalsKey(Key o) {
    if (!(o instanceof AesCtrHmacStreamingKey)) {
      return false;
    }
    AesCtrHmacStreamingKey that = (AesCtrHmacStreamingKey) o;
    return that.parameters.equals(parameters)
        && that.initialKeymaterial.equalsSecretBytes(initialKeymaterial);
  }
Represents a StreamingAead functions.

<p>See https://developers.google.com/tink/streaming-aead/aes_gcm_hkdf_streaming.
java_src/src/main/java/com/google/crypto/tink/streamingaead/AesCtrHmacStreamingKey.java