WordPress at a glance
function is not described

wp_maybe_load_widgets() WP 2.2.0

Determines if Widgets library should be loaded.

Checks to make sure that the widgets library hasn't already been loaded. If it hasn't, then it will load the widgets library and run an action hook.

Hooks in function
Return

Nothing (null).

Usage

wp_maybe_load_widgets();

Code of wp maybe load widgets: wp-includes/functions.php VER 5.1.1

<?php
function wp_maybe_load_widgets() {
	/**
	 * Filters whether to load the Widgets library.
	 *
	 * Passing a falsey value to the filter will effectively short-circuit
	 * the Widgets library from loading.
	 *
	 * @since 2.8.0
	 *
	 * @param bool $wp_maybe_load_widgets Whether to load the Widgets library.
	 *                                    Default true.
	 */
	if ( ! apply_filters( 'load_default_widgets', true ) ) {
		return;
	}

	require_once( ABSPATH . WPINC . '/default-widgets.php' );

	add_action( '_admin_menu', 'wp_widgets_add_menu' );
}