I have a cusrtom form, with multiple subclasses forms that I want to augment the Validation porion on the sublcasses, but I'm not sure how to go about it.

The Custom Form

class LeadCaptureForm extends Form {
	
	public function __construct($controller, $name) {


		$fields = new FieldList(
			$holder
		);
		
		$actions = new FieldList(
		   FormAction::create("leadSubmit")->setTitle($controller->FormButton)->setUseButtonTag(true)->addExtraClass('button red small point-right')
		);
		
		
		$validation = new RequiredFields(array('Email'));
		
		parent::__construct($controller, $name, $fields, $actions, $validation);
	
	}

The sublcassed forms look like this

class MarketForm extends LeadCaptureForm {
	function __construct($controller, $name) {
		 
		parent::__construct($controller, $name);

		$newfields = new CompositeField(
			$house,
			$homedeet,
			$propDeets
		);
		
		$this->Fields()->insertBefore($newfields, "main");
		
		
	}
}

On the MarketForm I'd like to add a few of the LeadCaptureForms to the validation as well as the the fields from MarketForm.