How to use ShapedRecipe to add custom craftings?

How to use ShapedRecipe to add custom craftings?

 

$item = Item::get(Item::STICK, 0, 1);
$item->setCustomName("STICK");
$itemName = new ShapedRecipe(
[


// EXAMPLE OF CRAFT
" A ",
" A ",
" B "
],
[


// HERE YOU PUT
// "A" => Item::get(id, meta, count),
// ETC ETC
"A"=>Item::get(Item:IRT, 0, 1),
"B"=>Item::get(Item::COBBLESTONE, 0, 1)
],
[$item]
);
$itemName->registerToCraftingManager(Server::getInstance()->getCraftingManager());

 

thx