Hello there ,I need some help

Hello there,I'm trying to make a kitGUI plugin but I need help with a code:
I want it like when you tap an item that is already on your inventory by the cosmetics to run a command,e.g:

If player tap diamond sword
Then execute command kitgui

 

PHP:

public function onInteract(PlayerInteractEvent $event){
    $player = $event->getPlayer();
    $in = $player->getInventory()->getItemInHand()->getCustomName();
    if($in == "Item Name Here"){
        $player->getServer()->dispatchCommand($player, "your_command_here");
    }
}

 

Thank you!!!!