Question about error constants

[Sören Steiger]

Hey!
Quick question:

Why are the error constants in ownable.sol public:

  string public constant NOT_CURRENT_OWNER = "018001";
  string public constant CANNOT_TRANSFER_TO_ZERO_ADDRESS = "018002";

And the error constants in nf-token.sol private? :

  string constant ZERO_ADDRESS = "003001";
  string constant NOT_VALID_NFT = "003002";
  string constant NOT_OWNER_OR_OPERATOR = "003003";
  string constant NOT_OWNER_APPROVED_OR_OPERATOR = "003004";
  string constant NOT_ABLE_TO_RECEIVE_NFT = "003005";
  string constant NFT_ALREADY_EXISTS = "003006";
  string constant NOT_OWNER = "003007";
  string constant IS_OWNER = "003008";

Is there a reason for that, or does it just not matter?
Is there any harm in making them all private?

Thanks!

[Kristijan Sedlak]

Just a design decision.

[Sören Steiger]

Cool, thanks!