Prado\Collections\TPriorityList::contains PHP Метод

    public function contains($item)
    {
        return $this->indexOf($item) >= 0;
    }

 public function testContainTPriorityLists()
 {
     $plist = new TPriorityList($this->plist);
     $this->assertTrue($plist->contains($this->pfirst));
     $this->assertTrue($plist->contains($this->pitem1));
     $this->assertTrue($plist->contains($this->pitem2));
     $this->assertTrue($plist->contains($this->pitem3));
     $this->assertFalse($plist->contains($this->pitem5));
 }