IDEA使用自定义类加载器，如果它没有在插件发行版中找到所需的类，则会在位于 IDEA_HOME / lib $中的所有jar中搜索它c $ c>目录。

IDEA uses custom classloader, if it doesn't find the required class in the plugin distribution, it's searched in all the jars located in IDEA_HOME/lib directory.