public ItemStack take(ItemStack template, int amount) {
Key k = Key.of(template);
Integer count = _elements.get(k);
if (count == null) return null;
ItemStack stack = k.stack().copy();
stack.stackSize =
Math.min(stack.getMaxStackSize(), Math.min(SLOT_STACK_LIMIT, Math.min(amount, count)));
_size -= stack.stackSize;
if (stack.stackSize >= count) _elements.remove(k);
else _elements.put(k, count - stack.stackSize);
return stack;
}
public Collection<ItemStack> allowed() {
List<ItemStack> list = new LinkedList<>();
for (Key k : _whitelist) list.add(k.stack());
return list;
}
public int get(int amount) {
return Math.min(_key.stack().getMaxStackSize(), Math.min(amount, _count));
}