public function test_without_returns_items_that_do_not_match_criteria()
{
$col = new Collection('int', [1, 2, 3, 4, 5]);
$odds = $col->without(function ($item) {
return $item % 2 == 0;
});
$this->assertEquals(new Collection('int', [1, 3, 5]), $odds);
}