@Override
    public String toString() {
      return name;
    }
Describes how the prefix is computed. For AEAD there are three main possibilities: NO_PREFIX
(empty prefix), TINK (prefix the ciphertext with 0x01 followed by a 4-byte key id in big endian
format) or CRUNCHY (prefix the ciphertext with 0x00 followed by a 4-byte key id in big endian
format)
java_src/src/main/java/com/google/crypto/tink/aead/AesGcmParameters.java