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Multi

Group any options database values under a single array key. This option has no design, inner options will look the same as other options (it’s like the group container).

// database value structure

'option_type_multi_id' => array(
    'inner_option_1' => ...
    'inner_option_2' => ...
)

array(
    'type'  => 'multi',
    'value' => array(
        'option-1' => 'value 1',
        'option-2' => 'value 2',
    ),
    'attr'  => array(
        'class' => 'custom-class',
        'data-foo' => 'bar',
        /*
        // Add this class to display inner options separators
        'class' => 'fw-option-type-multi-show-borders',
        */
    ),
    'label' => __('Label', '{domain}'),
    'desc'  => __('Description', '{domain}'),
    'help'  => __('Help tip', '{domain}'),
    'inner-options' => array(
        'option_1' => array( 'type' => 'text' ),
        'option_2' => array( 'type' => 'textarea' ),
    )
)

Important

The parameter that contains options is named inner-options not options otherwise this will be treated as a container option.