void () { for (Module module : ModuleManager.getInstance(myProject).getModules()) { CompilerModuleExtension extension = CompilerModuleExtension.getInstance(module); if (extension != null) { for (String url : extension.getOutputRootUrls(true)) { VirtualFile root = VirtualFileManager.getInstance().refreshAndFindFileByUrl(url); if (root != null) { UsefulTestCase.assertEmpty( "VFS should not be loaded for output: that increases the number of VFS events and reindexing costs", ((NewVirtualFile)root).getCachedChildren()); } } } } }