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 from the function
Return

null. Null. Nothing.

Usage

wp_maybe_load_widgets();

Changelog

Since 2.2.0 Introduced.

Code of wp_maybe_load_widgets() WP 5.7.1

<?php
function wp_maybe_load_widgets() {
	/**
	 * Filters whether to load the Widgets library.
	 *
	 * Returning a falsey value from 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' );
}