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.
- reply: A 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.
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