public function updateCMSFields(FieldList $fields)
{
$group = Group::get()->filter(array('code' => BlogEntry::config()->defaultGroup))->first();
$contentAuthors = $group->Members()->map('ID', 'Title');
$fields->insertAfter(HTMLEditorField::create("Summary")->setRows(4), "Content");
$fields->insertAfter(UploadField::create("FeatureImage"), "Summary");
$fields->insertAfter(DropdownField::create('AuthorMemberID', 'Author (Member)', $contentAuthors)->setEmptyString('(Select one)'), 'Date');
$fields->removeByName('Author');
$fields->insertAfter(TextField::create('Author', "Guest Author"), "AuthorMemberID");
}
