Lumberjack provides a handful of helpful functions that should make your life a little easier.
By default they are available as static methods on the \Rareloop\Lumberjack\Helpers class, so that the global namespace isn't getting polluted. You can safely use these methods without fear of function names clashing.
You can tell Lumberjack to create global functions for you if you do not mind about adding these functions to the global namespace.
If you are building packages or plugins specifically for Lumberjack, you cannot rely on the global helper functions as the theme may not have made them available.
Adding Global Helpers
In order to use the global helper functions, all you need to do it tell composer to autoload vendor/rareloop/lumberjack-core/src/functions.php.
Add the following to your top-level composer.json file: