Example - Filling an inventory with loot table contents

LinkedHashMap<String, Argument> arguments = new LinkedHashMap<>();
arguments.put("loottable", new LootTableArgument());

new CommandAPICommand("giveloottable")
    .withArguments(arguments)
    .executesPlayer((player, args) -> {
        LootTable lootTable = (LootTable) args[0];
    
    	LootContext context = /* Some generated LootContext relating to the lootTable*/
		lootTable.fillInventory(player.getInventory(), new Random(), context);
    })
    .register();

Developer's Note:

Honestly, I've not managed to get a successful example of using a LootTable in practice, due to being unable to generate a suitable LootContext. If you believe you can supply a suitable example for this page, feel free to send an example on the CommandAPI issues page.