code: private X509KeyManager loadCustomKeyManager(String kmClass) throws Exception {
          X509KeyManager km = null;
  
          try {
              ClassLoader cl = AccessController.doPrivileged(getCtxClassLoader);
  
              if (cl != null) {
                  try {
                      km = (X509KeyManager) cl.loadClass(kmClass).newInstance();
                  } catch (Exception e) {
                      // no ffdc needed
                  }
              }
  
              if (km == null) {
                  km = (X509KeyManager) Class.forName(kmClass).newInstance();
              }
  
              return km;
          } catch (Exception e) {
              FFDCFilter.processException(e, getClass().getName(), "loadCustomKeyManager", this);
              if (TraceComponent.isAnyTracingEnabled() && tc.isDebugEnabled())
                  Tr.debug(tc, "Exception loading custom KeyManager.", new Object[] { e });
              Tr.error(tc, "ssl.load.keymanager.error.CWPKI0021E", new Object[] { kmClass, e.getMessage() });
              throw e;
          }
      }
docs: this loads the KeyManager class, if present