@Deprecated
  public String getTypeUrl() {
    return getProto().getTypeUrl();
  }
@deprecated Instead, operate on the {@link Parameters} object obtained with {@link
    #toParameters}. If you really need this array, you need to first use
    TinkProtoParametersFormat to serialize this parameters object, then parse the result with
    the Tink-internal proto class "KeyTemplate".
java_src/src/main/java/com/google/crypto/tink/KeyTemplate.java