### Question:
XsuaaTokenFlows implements Serializable { public UserTokenFlow userTokenFlow() { return new UserTokenFlow(oAuth2TokenService, endpointsProvider, clientCredentials); } XsuaaTokenFlows(OAuth2TokenService oAuth2TokenService,
			OAuth2ServiceEndpointsProvider endpointsProvider, ClientCredentials clientCredentials); UserTokenFlow userTokenFlow(); ClientCredentialsTokenFlow clientCredentialsTokenFlow(); RefreshTokenFlow refreshTokenFlow(); PasswordTokenFlow passwordTokenFlow();  }### Answer:
@Test public void startUserTokenFlow() { UserTokenFlow flow = cut.userTokenFlow(); assertNotNull("UserTokenFlow must not be null.", flow); }