code: private static Method getNamedPCLAdder(Class beanClass) {
          try {
              return beanClass.getMethod("addPropertyChangeListener", NAMED_PCL_PARAMS);
          }
          catch (NoSuchMethodException e) {
              return null;
          }
      }
docs: Looks up and returns the method that adds a PropertyChangeListener
  for a specified property name to instances of the given class.
  
  @param beanClass   the class that provides the adder method
  @return the method that adds the PropertyChangeListeners