Example Code for using ACF building blocks

team member theme's functions.php

function register_acf_blocks() {
   // register a team member block.
   acf_register_block(array(
       'name'              => 'acf-team-member',
       'title'             => __('ACF Team Member'),
       'description'       => __('A custom team member block created via ACF 5.8'),
       'render_template'   => 'content-block-team-member.php',
       'category'          => 'formatting',
       'icon'              => 'admin-comments',
       'keywords'          => array( 'team member', 'team' ),
   ));
}
// Check if function exists and hook into setup.
if( function_exists('acf_register_block') ) {
   add_action('acf/init', 'register_acf_blocks');
}