presto-main/src/main/java/io/prestosql/sql/analyzer/FeaturesConfig.java/FeaturesConfig/setAggregationOperatorUnspillMemoryLimit
class FeaturesConfig:    @Config("aggregation-operator-unspill-memory-limit")
    @LegacyConfig("experimental.aggregation-operator-unspill-memory-limit")
    public FeaturesConfig setAggregationOperatorUnspillMemoryLimit(DataSize aggregationOperatorUnspillMemoryLimit)
    {
        this.aggregationOperatorUnspillMemoryLimit = aggregationOperatorUnspillMemoryLimit;
        return this;
    }