code: @Override
      public Set<Service> getServices(Set<URI> serviceUris) throws ServiceException {
          ImmutableSet.Builder<Service> result = ImmutableSet.builder();
          Service svc;
          for (URI svcUri : serviceUris) {
              svc = this.getService(svcUri);
              if (svc != null) {
                  result.add(svc);
              }
          }
          return result.build();
      }
docs: Obtains the service descriptions for all the services identified by the URI Set
  
  @param serviceUris the URIs of the service to obtain
  @return the list of all services that could be obtained. If none could be obtained the list will be empty.
  @throws uk.ac.open.kmi.iserve.sal.exception.ServiceException