public class LiteralFunctionInsertHandler implements InsertHandler<LookupElement> {
@Override
public void handleInsert(InsertionContext context, LookupElement item) {
int offset = context.getTailOffset();
Document doc = context.getDocument();
doc.insertString(offset, "(){\n}()");
Editor editor = context.getEditor();
int line = doc.getLineNumber(offset);
reformatLines(context.getFile(), editor, line, line + 1);
pressEnterAtLineEnd(editor);