code: @Deprecated
      public void AddUnprotected(CBORObject label, CBORObject value) throws CoseException {
          addAttribute(label, value, UNPROTECTED);
      }
docs: Set an attribute in the unprotected bucket of the COSE object
  
  @param label value identifies the attribute in the map
  @param value value to be associated with the label
  
  @deprecated As of COSE 0.9.1, use addAttribute(HeaderKeys, byte[], Attribute.UNPROTECTED);
  @exception CoseException COSE Package exception