### Question:
RetryingSolrServer extends SolrClient { @Override public DocumentObjectBinder getBinder() { return solrServer.getBinder(); } RetryingSolrServer(SolrClient solrServer, 
                            RetryPolicyFactory retryPolicyFactory, 
                            MetricsFacade metrics); final SolrClient getUnderlyingSolrServer(); @Override NamedList<Object> request(final SolrRequest request, String collection); @Override DocumentObjectBinder getBinder(); @Override void close();  }### Answer:
@Test public void testGetBinder() throws Exception { RetryingSolrServer retryingSolr = new RetryingSolrServer(solrServer, getNoRetryPolicyFactory(), getMetricsFacade()); assertSame(solrServer.getBinder(), retryingSolr.getBinder()); }