code: public void dispatchMethod (String name, Object[] arguments)
      {
          // first check the cache
          Method method = _mcache.get(name);
          if (method == null) {
              // if we haven't already determined this method doesn't exist, try
              // to resolve it
              if (!_mcache.containsKey(name)) {
                  _mcache.put(name, method = resolveMethod(name, arguments));
              }
          }
          if (method != null) {
              try {
                  method.invoke(_target, arguments);
              } catch (Exception e) {
                  log.warning("Failed to dispatch event callback " +
                      name + "(" + StringUtil.toString(arguments) + ").", e);
              }
          }
      }
docs: Dynamically looks up the method in question on our target and dispatches
  an event if it does.