code: public CommandHandler getRegisteredCommandHandler(String key) {
          if (TraceComponent.isAnyTracingEnabled()
              && tc.isEntryEnabled())
              SibTr
                              .entry(tc, "getRegisteredCommandHandler",
                                     new Object[] { key });
  
          // Get handler from table. Return null if not found
          CommandHandler cHandler = null;
          synchronized (_registeredHandlers) {
              cHandler = _registeredHandlers.get(key);
          }
  
          if (TraceComponent.isAnyTracingEnabled()
              && tc.isEntryEnabled())
              SibTr.exit(tc, "getRegisteredCommandHandler", cHandler);
  
          return cHandler;
      }
docs: /*
  Gets handler from table. Returns null if not in table
  
  @parm key
  
  @return command handler or null if not in table