unlink.php

<?php
// In my model
$package = $this->get($options['package_id']);
$products = $this->Products->find()
  ->where(['Products.package_id' => $options['package_id']])
  ->toArray();
$this->Products->unlink($package, $products);

// This is giving me an error:
// InvalidArgumentException
// Only an array or \Traversable is allowed for Collection

// But $products is an array of entities
// And $package is an entity
// So why doesn't it work?