code: public NetworkConfig setSSLConfig(SSLConfig sslConfig) {
          SecurityManager sm = System.getSecurityManager();
          if (sm != null) {
              sm.checkPermission(new HazelcastRuntimePermission("com.hazelcast.config.NetworkConfig.setSSLConfig"));
          }
          this.sslConfig = sslConfig;
          return this;
      }
docs: Sets the {@link SSLConfig}. null value indicates that no SSLConfig should be used.
  
  @param sslConfig the SSLConfig
  @return the updated NetworkConfig
  @see #getSSLConfig()
  @throws SecurityException If a security manager exists and the calling method doesn't have corresponding
  {@link HazelcastRuntimePermission}