15. Sortable multi input
'multi_input' => array(
'type' => 'multi_input',
'label' => esc_html__( 'Multi Input', 'my-domain' ),
'options' => array(
array(
'key' => 'facebook',
'label' => esc_html__( 'Facebook', 'my-domain' ),
'value' => '#facebook'
),
array(
'key' => 'twitter',
'label' => esc_html__( 'Twitter', 'my-domain' ),
),
array(
'key' => 'instagram',
'label' => esc_html__( 'Instagram', 'my-domain' ),
),
)
),