WordPress at a glance
function is not described

ActionScheduler_Logger::instance() public WC 1.0

{} It's a method of the class: ActionScheduler_Logger{}

Hooks from the method
Return

ActionScheduler_Logger.

Usage

$result = ActionScheduler_Logger::instance();

Code of ActionScheduler_Logger::instance() WC 5.0.0

<?php
public static function instance() {
	if ( empty(self::$logger) ) {
		$class = apply_filters('action_scheduler_logger_class', 'ActionScheduler_wpCommentLogger');
		self::$logger = new $class();
	}
	return self::$logger;
}