code: @Override
      public T addAsLibraries(File... resources) throws IllegalArgumentException {
          Validate.notNull(resources, "Resources must be specified");
          for (File resource : resources) {
              addAsLibrary(resource);
          }
          return covarientReturn();
      }
docs: /*
  (non-Javadoc)
  
  @see org.jboss.shrinkwrap.api.container.LibraryContainer#addLibraries(java.io.File[])