code: public static Option bootClasspathLibraries(final String... urls) {
          validateNotEmptyContent(urls, true, "Urls");
          final List<BootClasspathLibraryOption> options = new ArrayList<BootClasspathLibraryOption>();
          for (String url : urls) {
              options.add(bootClasspathLibrary(url));
          }
          return bootClasspathLibraries(options
              .toArray(new BootClasspathLibraryOption[options.size()]));
      }
docs: Creates a composite option of {@link org.ops4j.pax.exam.options.BootClasspathLibraryOption}s.
  
  @param urls
  boot classpath library urls (cannot be null or containing null entries)
  
  @return composite option of boot classpath options
  
  @throws IllegalArgumentException
  - If urls array is null or contains null entries