Form::merge

public function merge($params)
{
	$oldData = $this->get();

	if (isset($params['AGREEMENTS']))
	{
		$agreements = [];
		foreach ($params['AGREEMENTS'] as $agreement)
		{
			$agreementId = (int) ($agreement['ID'] ?? $agreement['AGREEMENT_ID']);
			$agreements[$agreementId] = $agreement;
		}
		$params['AGREEMENTS'] = array_values($agreements);
	}

	$params['FORM_SETTINGS'] = isset($params['FORM_SETTINGS']) ? $params['FORM_SETTINGS'] : [];
	$params['FORM_SETTINGS'] = $params['FORM_SETTINGS'] + $oldData['FORM_SETTINGS'];
	$this->set($params + $oldData);
}