laravel collection diffkeys

1$collection = collect([
2    'one' => 10,
3    'two' => 20,
4    'three' => 30,
5    'four' => 40,
6    'five' => 50,
7]);
8
9$diff = $collection->diffKeys([
10    'two' => 2,
11    'four' => 4,
12    'six' => 6,
13    'eight' => 8,
14]);
15
16$diff->all();
17
18// ['one' => 10, 'three' => 30, 'five' => 50]