/**
* Return a repeater field configuration array
* @return array
*/
public function build()
{
$config = parent::build();
$fields = $this->fieldsBuilder->build();
$config['sub_fields'] = $fields['fields'];
if (array_key_exists('collapsed', $config)) {
$fieldKey = $this->fieldsBuilder->getField($config['collapsed'])->getKey();
$fieldKey = preg_replace('/^field_/', '', $fieldKey);
$config['collapsed'] = $this->getName() . '_' . $fieldKey;
}
return $config;
}
