code: @Override
      public X509Certificate[] getCertificateChain(String s) {
          if (TraceComponent.isAnyTracingEnabled() && tc.isEntryEnabled())
              Tr.entry(tc, "getCertificateChain: " + s);
  
          X509Certificate[] rc = getX509KeyManager().getCertificateChain(s);
  
          if (TraceComponent.isAnyTracingEnabled() && tc.isEntryEnabled())
              Tr.exit(tc, "getCertificateChain", rc);
          return rc;
      }
docs: /*
  @see javax.net.ssl.X509KeyManager#getCertificateChain(java.lang.String)