gistfile1.php

<?php

Class Pepe
{
    protected $loaded;
    
    public function __construct()
    {
        $that                 = $this;
        $this->loaded         = function () use ($that) {
            $that->load();
        };
    }
    
    public function haceAlgo(){
        $this->loaded && $this->loaded->__invoke();
    }
    
    public function load()
    {
        //...
    }
}

Explicación de porqué no usa $this->loaded();

http://stackoverflow.com/questions/7067536/how-to-call-a-closure-that-is-a-class-variable

Código sacado de:

https://github.com/AV4TAr/BjyAuthorize/blob/master/src/BjyAuthorize/Service/Authorize.php#L158