Creating Default Entries within a Repeatable Group

Wondering how I would approach creating some default entries within the repeatable group type?

ie. I have a Meta Box “Meta Group” with a repeatable group of a text input & text area, and I would like to be able to have a few defaults populated, with the option to create more.

Here’s my code.

$meta_boxes['meta_group'] = array(
    'id'           => 'meta_group',
    'title'        => __( 'Meta Group', 'cmb2' ),
    'object_types' => array( 'post', ),
    'closed'       => true,
    'fields'       => array(
        array(
            'id'          => $prefix . 'meta_group',
            'type'        => 'group',
            'options'     => array(
                'group_title'   => __( 'Meta Group {#}', 'cmb2' ),
                'add_button'    => __( 'Add Paragraph', 'cmb2' ),
                'remove_button' => __( 'Remove Paragraph', 'cmb2' ),
                'sortable'      => false, // beta
            ),
            'fields'      => array(
                array(
                    'name' => 'Title',
                    'default' => 'Title ',
                    'id'   => 'title',
                    'type' => 'text',
                ),
                array(
                    'name' => 'Description',
                    'id'   => 'description',
                    'type' => 'textarea',
                ),
            ),
        ),
    ),
);

https://ww.wp.xz.cn/plugins/cmb2/