MathPHP\SetTheory\Set::isDisjoint PHP Method

    public function isDisjoint(Set $other) : bool
    {
        return empty(array_intersect_key($this->A, $other->asArray()));
    }

 /**
  * @dataProvider dataProviderForNotDisjoint
  */
 public function testNotDisjoint(array $A, array $B)
 {
     $setA = new Set($A);
     $setB = new Set($B);
     $this->assertFalse($setA->isDisjoint($setB));
 }