@Override
      public void beforePluginUnload(@NotNull IdeaPluginDescriptor pluginDescriptor, boolean isUpdate) {
        // When a language plugin is unloaded, make sure we don't have references to any injection host PSI from this language
        // in the injector cache
        clearInjectorCache();
      }
@Override
      public void beforePluginUnload(@NotNull IdeaPluginDescriptor pluginDescriptor, boolean isUpdate)