code: @Nonnull
      public String newPciAddresses(@Nonnegative int count, @Nonnull String separator) {
          StringBuilder buf = new StringBuilder();
          for (int i = 0; i < count; i++) {
              if (i > 0)
                  buf.append(separator);
              buf.append(newPciAddress());
          }
          return buf.toString();
      }
docs: Returns a comma-separated list of new PCI addresses.
  
  @param count How many addresses to return.
  @param separator The separator to use between addresses.
  @return A separated String of new PCI addresses.