Gets the classic menu assigned to the primary navigation menu location if it exists.

Return

Source

private static function get_nav_menu_at_primary_location() {
	$locations = get_nav_menu_locations();

	if ( isset( $locations['primary'] ) ) {
		$primary_menu = wp_get_nav_menu_object( $locations['primary'] );

		if ( $primary_menu ) {
			return $primary_menu;
		}
	}

	return null;
}

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