system/Config/BaseService.php
protected static function discoverServices(string $name, array $arguments)
	{
		if (! static::$discovered)
		{
			$config = config('Modules');

			if ($config->shouldDiscover('services'))
			{
				$locator = static::locator();
				$files   = $locator->search('Config/Services');

				if (empty($files))
				{
					// no files at all found - this would be really, really bad
					return null;
				}

				// Get instances of all service classes and cache them locally.
				foreach ($files as $file)
				{
					$classname = $locator->getClassname($file);

					if (! in_array($classname, ['CodeIgniter\\Config\\Services']))
					{
						static::$services[] = new $classname();
					}
				}
			}

			static::$discovered = true;
		}

		if (! static::$services)
		{
			// we found stuff, but no services - this would be really bad
			return null;
		}

		// Try to find the desired service method
		foreach (static::$services as $class)
		{
			if (method_exists(get_class($class), $name))
			{
				return $class::$name(...$arguments);
			}
		}

		return null;
	}
protected static function discoverServices(string $name, array $arguments)
	{
		if (! static::$discovered)
		{
			$config = config('Modules');

			if ($config->shouldDiscover('services'))
			{
				$locator = static::locator();
				$files   = $locator->search('Config/Services');

				if (empty($files))
				{
					// no files at all found - this would be really, really bad
					return null;
				}

				// Get instances of all service classes and cache them locally.
				foreach ($files as $file)
				{
					$classname = $locator->getClassname($file);

					if (! in_array($classname, ['CodeIgniter\\Config\\Services']))
					{
						static::$services[] = new $classname();
					}
				}
			}

			static::$discovered = true;
		}

		if (! static::$services)
		{
			// we found stuff, but no services - this would be really bad
			return null;
		}

		// Try to find the desired service method
		foreach (static::$services as $class)
		{
			if (method_exists(get_class($class), $name))
			{
				return $class::$name(...$arguments);
			}
		}

		return null;
	}
Will scan all psr4 namespaces registered with system to look
for new Config\Services files. Caches a copy of each one, then
looks for the service method in each, returning an instance of
the service, if available.

@param string $name
@param array  $arguments

@return mixed