bool mongoc_error_has_label (const bson_t *reply, const char *label);
Test whether a reply from a failed operation includes a specific error label. See Error Labels for details, and see mongoc_client_session_start_transaction() for example code that demonstrates their use.
bson_t, the reply to a failed operation.
label: The label to test for, such as “TransientTransactionError” or “UnknownTransactionCommitResult”.
Returns true if
reply contains the error label.