code: @Override
      public T addAsManifestResources(Package resourcePackage, String... resourceNames) throws IllegalArgumentException {
          Validate.notNull(resourcePackage, "ResourcePackage must be specified");
          Validate.notNullAndNoNullValues(resourceNames,
              "ResourceNames must be specified and can not container null values");
          for (String resourceName : resourceNames) {
              addAsManifestResource(resourcePackage, resourceName);
          }
          return covarientReturn();
      }
docs: /*
  (non-Javadoc)
  
  @see org.jboss.shrinkwrap.api.container.ManifestContainer#addManifestResources(java.lang.Package,
  java.lang.String[])