presto-main/src/main/java/io/prestosql/sql/analyzer/FeaturesConfig.java/FeaturesConfig/setSpillWindowOperator
class FeaturesConfig:    @Config("spill-window-operator")
    @LegacyConfig("experimental.spill-window-operator")
    public FeaturesConfig setSpillWindowOperator(boolean spillWindowOperator)
    {
        this.spillWindowOperator = spillWindowOperator;
        return this;
    }