code: @Override
      public synchronized ChainGroupData updateChainGroup(String groupName, String[] chainNames) throws ChainGroupException, InvalidChainNameException {
          if (TraceComponent.isAnyTracingEnabled() && tc.isDebugEnabled()) {
              Tr.debug(tc, "Updating chain group, " + groupName);
          }
  
          // Input parameters validated internally
          return addChainGroup(groupName, chainNames);
      }
docs: /*
  @see
  com.ibm.wsspi.channelfw.ChannelFramework#updateChainGroup(java.lang.String,
  java.lang.String[])