code: public void putMcToMCWMap(ManagedConnection mc, MCWrapper mcw) {
          mcToMCWMapWrite.lock();
          try {
              mcToMCWMap.put(mc, mcw);
          } finally {
              mcToMCWMapWrite.unlock();
          }
      }
docs: Put the mcw in the hash map
  
  @param mc
  @param mcw