RequirementCollection::all PHP Method

    public function all()
    {
        return $this->requirements;
    }

 /**
  * Adds a requirement collection to the current set of requirements.
  *
  * @param RequirementCollection $collection A RequirementCollection instance
  */
 public function addCollection(RequirementCollection $collection)
 {
     $this->requirements = array_merge($this->requirements, $collection->all());
 }