To create a custom Action Code, you just need to enter an action name that doesn't already exist into the callback parameter.
We recommend using a prefix related to your plugin. For example: MyPlugin.ActionName. This keeps your actions distinguished from others and avoids conflicts.
use Saturn\HookManager\Actions;
$Actions = new Actions();
$Actions->Register('ActionCode', array(new ExampleClass(),'ExampleFunction'), array($Parameters));
use Saturn\HookManager\Actions;
$Actions = new Actions();
$Actions->Register('ActionCode', '\Namespace\Class::Function', array($Parameters));