code: public static Label.Builder format(final Label.Builder label) {
          for (final MapFieldEntry.Builder entryBuilder : label.getEntryBuilderList()) {
              final List<String> valueList = new ArrayList<>(entryBuilder.getValueList());
              entryBuilder.clearValue();
              for (String value : valueList) {
                  entryBuilder.addValue(format(value));
              }
          }
          return label;
      }
docs: Format the given label by removing duplicated white spaces, underscores and camel cases in all entries.
  
  @param label the label to format.
  
  @return the formatted label.