Opening the crafting interface?

Anyone know how to open the crating interface without a crafting table?

I'm just blindly guessing but you can try look at this:
https://github.com/PocketMine/PocketMine-MP/blob/master/src/pocketmine/inventory/CustomInventory.php
https://github.com/PocketMine/PocketMine-MP/blob/master/src/pocketmine/inventory/CraftingManager.php
https://github.com/PocketMine/Pocke...rc/pocketmine/inventory/CraftingInventory.php

and this
https://forums.pocketmine.net/threads/code-open-craftingteable.15056/