void (@NotNull Class<?> aClass) { if (isInitialized()) { Logger.getInstance(IStubElementType.class) .error("All stub element types should be created before index initialization is complete.\n" + "Please add the " + aClass + " containing stub element type constants to \"stubElementTypeHolder\" extension.\n" + "Registered extensions: " + StubElementTypeHolderEP.EP_NAME.getExtensionList()); } }