public function __construct($controller, $name, DNEnvironment $environment, DNProject $project)
{
$field = $this->buildCommitSelector($project);
$validator = new DeployForm_CommitValidator();
$actions = new FieldList(new FormAction('showDeploySummary', 'Plan deployment', 'Show deployment plan'), new FormAction('doDeploy', 'Do deploy', 'Do deploy'));
parent::__construct($controller, $name, new FieldList($field), $actions, $validator);
}