presto-main/src/main/java/io/prestosql/sql/analyzer/FeaturesConfig.java/FeaturesConfig/setPushTableWriteThroughUnion
class FeaturesConfig:    @Config("optimizer.push-table-write-through-union")
    public FeaturesConfig setPushTableWriteThroughUnion(boolean pushTableWriteThroughUnion)
    {
        this.pushTableWriteThroughUnion = pushTableWriteThroughUnion;
        return this;
    }