- reply: A non-NULL pointer to overwritable storage
<https://www.mongoc.org/libbson/current/lifetimes.html> for a
bson_t <https://www.mongoc.org/libbson/current/bson_t.html>
to contain the results.
- label: The label to test for, such as
"TransientTransactionError" or
"UnknownTransactionCommitResult".
Returns true if reply contains the error label.
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