* @since 1.0.0
	 * @since 1.4.0 Add status tools class.
	 * @since 1.9.0 Added course progress block class.
	 * @since 2.0.0 Return early if LifterLMS isn't installed, move file inclusion to `$this->includes()`,
	 *              and moved actions and filters from the constructor.
	 * @since 2.2.1 Handle '-src' in WordPress version numbers.
	 * @since 2.5.0 Updated minimum LifterLMS core version to 7.2.0.
	 *
	 * @return  void
	 */
	public function init() {

		if ( ! function_exists( 'llms' ) || ! version_compare( self::MIN_CORE_VERSION, llms()->version, '<=' ) ) {
			return;
		}

		$this->includes();

		add_action( 'add_meta_boxes', array( $this, 'remove_metaboxes' ), 999, 2 );

		global $wp_version;
		$filter = version_compare( $wp_version, '5.8-src', '>=' ) ? 'block_categories_all' : 'block_categories';

		add_filter( $filter, array( $this, 'add_block_category' ) );
		add_action( 'admin_print_scripts', array( $this, 'admin_print_scripts' ), 15 );