code: public Optional<Client> findClient(final String name) {
          CommonHelper.assertNotBlank("name", name);
          init();
          final String lowerTrimmedName = name.toLowerCase().trim();
          final Client client = _clients.get(lowerTrimmedName);
          if (client != null) {
              return Optional.of(client);
          }
          LOGGER.debug("No client found for name: {}", name);
          return Optional.empty();
      }
docs: Return the right client according to the specific name.
  
  @param name name of the client
  @return the right client