@Override
  public boolean nextTabOnItemSelected(final ExpressionContext context, final LookupElement item) {
    Object object = item.getObject();
    if (object instanceof PsiFileSystemItem && ((PsiFileSystemItem)object).isDirectory()) {
      return false;
    }
    return true;
  }
@Override
  public boolean nextTabOnItemSelected(final ExpressionContext context, final LookupElement item)