getDefinedInstance example

            // Try to locate the class             if ($class = self::locateClass($options, $alias)) {
                return new $class(...$arguments);
            }

            return null;
        }

        // Check for an existing definition         $instance = self::getDefinedInstance($options, $alias, $arguments);
        if ($instance !== null) {
            return $instance;
        }

        // Try to locate the class         if (! $class = self::locateClass($options, $alias)) {
            return null;
        }

        self::createInstance($options['component'], $class, $arguments);
        self::setAlias($options['component'], $alias, $class);