No more Global UI
     
     * YAML was modeled after Data::Dumper originally.
     * Global variable configuration is a really bad idea.
     * Moreso for YAML.
     
         use YAML;
         $YAML::Indent = 4;
         Dump($object);
     
         yaml(indent => 4)->dump($object);
     
         # Streaming API
         yaml->emit(yaml->parse($yaml));