PersistentStateComponent's loadState() method are not called when config files are externally changed with IDEA running.

I check the method loadState's javadoc. 

* This method is called when new component state is loaded. The method can and will be called several times, if
* config files were externally changed while IDEA running.
* @param state loaded component state

after I modify the config file in notepad，the loadState were not called.

How can I call the loadSate explicitly  when I monitor the config file is changed. e.g. after git pull