Collections\Collection::contains PHP 메소드

    public function contains(callable $condition)
    {
        return (bool) $this->find($condition);
    }

 public function test_contains_finds_when_no_match_returns_false()
 {
     $result = $this->col->contains(function (TestClassA $item) {
         return $item->getValue() == 42;
     });
     $this->assertFalse($result);
 }