There are some settings for your plugin that not all users need. To keep the user interface clean and organized for the majority of users, you can nest and organize fields in a variety of ways.

The simplest method is to add an options panel. Here we will add an options panel to nest the price postfix in an expandable accordion.

 $this->add_on->add_field( 'property_price', 'Property Price', 'text', null, 'Only digits, example: 435000' );

$this->add_on->add_options(
        null,
        'Price Settings', 
        array(
                $this->add_on->add_field( 'property_price_postfix', 'Price Postfix', 'text', null, 'Example: Per Month' )
        )
);

You can choose to add such an options panel attached to the price field.

 $this->add_on->add_options( 
        $this->add_on->add_field( 'property_price', 'Property Price', 'text', null, 'Only digits, example: 435000' ),
        'Price Settings', 
        array(
                $this->add_on->add_field( 'property_price_postfix', 'Price Postfix', 'text', null, 'Example: Per Month' ),
                $this->add_on->add_field( 'property_price_currency', 'Currency Symbol', 'text', null, 'Example: $, or €' )
        )
);

Nested Radio Fields

You can also nest fields within the radio field. You can add as many fields as you like to the radio field’s options array.

 $this->add_on->add_field(
        'property_location',
        'Property Location',
        'radio', 
        array(
                'enter_address' => array(
                        'Enter Address',
                        $this->add_on->add_field( 'property_address', 'Property Address', 'text' )
                ),
                'enter_coordinates' => array(
                        'Enter Coordinates',
                        $this->add_on->add_field( 'property_coordinates', 'Property Coordinates', 'text' )
                ),
        )
);

No Limits

You can even get a little crazy. There is no limit to how you can combine options panels and nested radio fields.

$this->add_on->add_field(
        'location_settings',
        'Property Location',
        'radio', 
        array(
                'search_by_address' => array(
                        'Search by Address',
                        $this->add_on->add_options( 
                                $this->add_on->add_field( 'property_address','Property Address','text' ),
                                'Google Geocode API Settings', 
                                array(
                                        $this->add_on->add_field(
                                                'geocode_method',
                                                'Request Method',
                                                'radio',
                                                array(
                                                        'key_false' => array(
                                                                'No API Key',
                                                                'Limited number of requests.'
                                                        ),
                                                        'key_true' => array(
                                                                'Google Developers API Key',
                                                                $this->add_on->add_field( 'api_key', 'API Key', 'text' ),
                                                                'Up to 2,500 requests per day and 5 requests per second.'
                                                        )
                                                )
                                        ) 
                                ) // end Google Geocode API Settings fields
                        ) 
                ), // end Search by Address radio field
                'enter_coordinates' => array(
                        'Enter Coordinates',
                        $this->add_on->add_field( 'property_latitude', 'Latitude', 'text' ),
                        $this->add_on->add_field( 'property_longitude', 'Longitude', 'text' )
                )
        )
);

Related Docs

The Structure of an Import Add-On

See the complete structure for an import Add-On created for WP All Import.

Add-On API Text Fields

Learn about text fields for WP All Import Add-Ons.

Add-On API Radio Fields

Learn about using radio fields for WP All Import Add-Ons.

Add-On API Image Fields

Learn about using image fields in your WP All Import Add-On.