I tried researching the $this$->$load$\_$dependencies$()$; code online to understand it$,$ but I haven$$t found anything that makes sense to me$.$ This line of code is within the PHP code below. Can anybody help me understand this line of code within the file below:

plugin$\_$slug $=$ 'single$-$post$-$meta$-$manager$-$slug';

$this$->$version $=\text{'}0\mathrm{.}2\mathrm{.}0\text{'}$;

$this$->$load$\_$dependencies$()$;

$this$->$define$\_$admin$\_$hooks$()$;

$\}$

private function load$\_$dependencies$()\{$

require$\_$once plugin$\_$dir$\_$path$($ dirname$(\_\_$FILE$\_\_)).$ 'admin$/$class$-$single$-$post$-$meta$-$manager$-$admin.php$\text{'}$;

require$\_$once plugin$\_$dir$\_$path$(\_\_$FILE$\_\_).$ 'class$-$single$-$post$-$meta$-$manager$-$loader.php$\text{'}$;

$this$->$loader $=$ new Single$\_$Post$\_$Meta$\_$Manager$\_$Loader$()$;

$\}$

private function define$\_$admin$\_$hooks$()\{$

$admin $=$ new Single$\_$Post$\_$Meta$\_$Manager$\_$Admin$($ $this$->$get$\_$version$())$;

$this$->$loader$->$add$\_$action$($ 'admin$\_$enqueue$\_$scripts', $admin, 'enqueue$\_$styles' $)$;

$this$->$loader$->$add$\_$action$($ 'add$\_$meta$\_$boxes', $admin, 'add$\_$meta$\_$box' $)$;

$\}$

public function run$()\{$

$this$->$loader$->$run$()$;

$\}$

public function get$\_$version$()\{$

return $this$->$version;

$\}$

$\}$