Add type hints for dynamically-created instances.

library/Solarium/QueryType/Select/Query/Component/FacetSet.php

@@ -453,6 +453,7 @@ class FacetSet extends Component
         $class = $this->facetTypes[$type];
 
         if (is_string($options)) {
+            /** @var \Solarium\QueryType\Select\Query\Component\Facet\Facet $facet */
             $facet = new $class;
             $facet->setKey($options);
         } else {

library/Solarium/QueryType/Select/ResponseParser/Component/FacetSet.php

@@ -92,6 +92,7 @@ class FacetSet extends ResponseParserAbstract implements ComponentParserInterfac
                     foreach ($facets as $k => $facet) {
                         $facetObject = $facetSet->$method($k);
                         if ($key == 'facet_pivot') {
+                            /** @var \Solarium\QueryType\Select\Query\Component\Facet\Pivot $facetObject */
                             $facetObject->setFields($k);
                         }
                     }