presto-mongodb/src/main/java/io/prestosql/plugin/mongodb/MongoClientConfig.java/MongoClientConfig/setWriteConcern
class MongoClientConfig:    @Config("mongodb.write-concern")
    public MongoClientConfig setWriteConcern(WriteConcernType writeConcern)
    {
        this.writeConcern = writeConcern;
        return this;
    }