driver-core/src/main/com/mongodb/connection/BulkWriteBatchCombiner.java
public void addErrorResult(final List<BulkWriteError> writeErrors,
                               final WriteConcernError writeConcernError, final IndexMap indexMap) {
        mergeWriteErrors(writeErrors, indexMap);
        mergeWriteConcernError(writeConcernError);
    }
public void addErrorResult(final List<BulkWriteError> writeErrors,
                               final WriteConcernError writeConcernError, final IndexMap indexMap) {
        mergeWriteErrors(writeErrors, indexMap);
        mergeWriteConcernError(writeConcernError);
    }
Add a list of error results and a write concern error

@param writeErrors       the errors
@param writeConcernError the write concern error
@param indexMap          the index map