code: public Client updateClient(String clientId, Client client, AccessToken accessToken) {
          return getAuthService().updateClient(clientId, client, accessToken);
      }
docs: Get OSIAM OAuth client by the given ID.
  
  @param clientId    the id of the client which should be updated
  @param client      the client
  @param accessToken the access token used to access the service
  @return The updated client
  @throws UnauthorizedException             if the accessToken is not valid
  @throws ConnectionInitializationException if the connection to the given OSIAM service could not be initialized
  @throws ConflictException                 if the client with the clientId already exists
  @throws IllegalStateException             if OSIAM's endpoint(s) are not properly configured