### Question:
HttpSessions { public static HttpSessions getInstance() { return httpSessions; } private  HttpSessions(); static HttpSessions getInstance(); synchronized HttpResumableSession getOrCreateResumableSession(
      final HttpResumableInfo resumableInfo, final String rulename,
      final String comment, final HttpAuthent authent); boolean removeSession(final HttpResumableInfo resumableInfo); boolean removeSession(final HttpResumableSession resumableSession);  }### Answer:
@Test public void testGetInstance() throws Exception { HttpSessions sessions = HttpSessions.getInstance(); assertNotNull(sessions); }