'spacing' => array(
'type' => 'spacing',
'label' => esc_html__( 'Margin/Padding Option', 'my-domain' ),
'units' => ['px', 'em'],
'value' => [
'top' => '10',
'right' => '20',
'bottom' => '30',
'left' => '40',
'unit' => 'px',
],
'description' => esc_html__( 'Description', 'my-domain' ),
),
