presto-main/src/main/java/io/prestosql/sql/analyzer/FeaturesConfig.java/FeaturesConfig/setOptimizeHashGeneration
class FeaturesConfig:    @Config("optimizer.optimize-hash-generation")
    public FeaturesConfig setOptimizeHashGeneration(boolean optimizeHashGeneration)
    {
        this.optimizeHashGeneration = optimizeHashGeneration;
        return this;
    }