presto-main/src/main/java/io/prestosql/server/PrefixObjectNameGeneratorModule.java/PrefixObjectNameGeneratorModule/PrefixObjectNameGeneratorModule
class PrefixObjectNameGeneratorModule:    public PrefixObjectNameGeneratorModule(String packagePrefix)
    {
        this.packagePrefix = requireNonNull(packagePrefix, "packagePrefix is null");
    }