code: public void dumpAll(Iterable<? extends YamlNode> data, Writer output) {
          dumpAll(data.iterator(), output);
      }
docs: Dumps {@code data} into a {@code Writer}.
  
  @param data   the data
  @param output the writer
  
  @see org.yaml.snakeyaml.Yaml#dumpAll(Iterator, Writer)