Hello, I have an issue with converting json string to ItemStack.
Here's my prototype code:

        NBTItem nbtItem = new NBTItem(event.getItem());
        String nbtItemString = nbtItem.asNBTString();
        System.out.println(nbtItemString);

        ItemStack item = NBTItem.convertNBTtoItem(new NBTContainer(nbtItemString));
        System.out.println(item);

And the output is:
{lvl:"1",display:{Lore:["This hopper teleports specified monster type","To it's location & freezes them","* Current mob: Pig"],Name:"[MobGrind] Hopper"},isGlobal:"false",isAuto:"false",ent:"PIG",type:"Grind",name0:"grindHopper"}

ItemStack{AIR x 0}

Am I doing smth wrong?

Yea, you have to use NBTItem.convertItemtoNBT(item).asNBTString().
If you just use an NBTItem and call asNBTString() you just get the data on the Item, but not the Item itself.

@misterzet Any other problems or can I close the issue?