/**
  * @dataProvider containsFalseProvider
  */
 public function testContainsFalse($a1, $a2)
 {
     $facetGroupSet1 = new FacetGroupSet(array(4 => array(3, 2)));
     $facetGroupSet2 = new FacetGroupSet(array(4 => array(2)));
     $this->assertFalse($facetGroupSet1->contains($facetGroupSet2));
 }