Need help getting Relevanssi to index custom fields in custom database table

The code provided in the YouTube video used by ACF Custom Tables didn't work. Relevanssi support was quick to respond and they had a code snippet that did work! Here it is below. I asked for additional help supporting multiple custom tables and custom fields within those tables.

add_filter( 'relevanssi_content_to_index', function( $content, $post_object ) {
  $args = [
    'storage_type' => 'custom_table',
    'table'        => 'table_name',
  ];
  $content .= ' ' . rwmb_meta( 'field_name', $args, $post_object->ID );
  return $content;
}, 10, 2 );