Magento 2 REST API – Batch Update Stock Items

I have built a custom module that will save a single stock item via REST API (similar to what is already available) – however, how would this be done with multiple stock items within the same request (like a batch update). I've tried to make the @param an /../../inventoryItem[] in my method definition in the module/api folder, but it doesn't seem to work.

I see we can't simply send an array as we could in Magento 1.

the structure would be something like

{"inventory":[{"sku"=>"some_sku", "qty"=>10}, {"sku"=>"some_sku2", "qty"=>12}]}.

If someone could lead me over this architecturally – especially with the interfaces/classes required, then that would be helpful.

I assume I'd need such classes (as below) – one for the inventory object, another for the array – but I haven't worked extensively with interfaces and having trouble defining things in a Magento way.

<?php

class InventoryObject {

    private $sku;
    private $qty;

    public function __construct($sku, $qty) {
        $this->qty = $qty;
        $this->sku = $sku;
    }

    public function getQty(){
        return $this->qty;
    }

    public function setQty($qty){
        $this->qty = $qty;
    }

    public function getSku(){
        return $this->sku;
    }

    public function setSku($sku){
        $this->sku = $sku;
    }

}

class InventoryObjectArray {

    private $inventoryObject = array();

    public function __construct(InventoryObject $io) {
        $this->inventoryObject[] = $io;     
    }


    public function setInventoryObject(InventoryObject $io) {
        $this->inventoryObject[] = $io; 
    }

    public function getInventoryObject() {

        return $this->inventoryObject;      
    }

}

then after this, I can loop through and save stock items one by one. Do I need to define this?
Or just use the standard stockitem object and pass into an array?
In any case, bit confused and need assistance structuring things properly.