function emitApprovalEvent(address _account, address _operator, bool _approved) external
function emitUriEvent(string _value, uint256 _id) external
function emitTransferSingleEvent(address _operator, address _from, address _to, uint256 _id, uint256 _value) external
function emitTransferBatchEvent(address _operator, address _from, address _to, uint256[] _ids, uint256[] _values) external
