protected function get_retention_period_fields(string $prefix = '') : \stdClass {
        $prefix = "{$prefix}retentionperiod";
        $data = (object) [
            'fields' => [],
            'types' => [],
        ];

        $number = $this->_form->createElement('text', "{$prefix}number", null, ['size' => 8]);
        $data->types["{$prefix}number"] = PARAM_INT;

        $unitoptions = [
            'Y' => get_string('years'),
            'M' => strtolower(get_string('months')),
            'D' => strtolower(get_string('days'))
        ];
        $unit = $this->_form->createElement('select', "{$prefix}unit", '', $unitoptions);

        $data->fields[] = $this->_form->createElement(
                'group',
                $prefix,
                get_string('retentionperiod', 'tool_dataprivacy'),
                [
                    'number' => $number,
                    'unit' => $unit,
                ],
                null,
                false
            );

        return $data;
    }
protected function get_retention_period_fields(string $prefix = '') : \stdClass {
        $prefix = "{$prefix}retentionperiod";
        $data = (object) [
            'fields' => [],
            'types' => [],
        ];

        $number = $this->_form->createElement('text', "{$prefix}number", null, ['size' => 8]);
        $data->types["{$prefix}number"] = PARAM_INT;

        $unitoptions = [
            'Y' => get_string('years'),
            'M' => strtolower(get_string('months')),
            'D' => strtolower(get_string('days'))
        ];
        $unit = $this->_form->createElement('select', "{$prefix}unit", '', $unitoptions);

        $data->fields[] = $this->_form->createElement(
                'group',
                $prefix,
                get_string('retentionperiod', 'tool_dataprivacy'),
                [
                    'number' => $number,
                    'unit' => $unit,
                ],
                null,
                false
            );

        return $data;
    }
protected function get_retention_period_fields ( string $ prefix = '' ) : \ stdClass { $ prefix = "{$prefix}retentionperiod" ; $ data = ( object ) [ 'fields' => [ ] , 'types' => [ ] , ] ; $ number = $ this -> _form -> createElement ( 'text' , "{$prefix}number" , null , [ 'size' => 8 ] ) ; $ data -> types [ "{$prefix}number" ] = PARAM_INT ; $ unitoptions = [ 'Y' => get_string ( 'years' ) , 'M' => strtolower ( get_string ( 'months' ) ) , 'D' => strtolower ( get_string ( 'days' ) ) ] ; $ unit = $ this -> _form -> createElement ( 'select' , "{$prefix}unit" , '' , $ unitoptions ) ; $ data -> fields [ ] = $ this -> _form -> createElement ( 'group' , $ prefix , get_string ( 'retentionperiod' , 'tool_dataprivacy' ) , [ 'number' => $ number , 'unit' => $ unit , ] , null , false ) ; return $ data ; }
Get the retention period fields.

@param   string  $prefix The name of the main field, and prefix for the subfields.
@return  \stdClass
Get the retention period fields .