Merge pull request #282 from oliverklee/cleanup/types-atruleblocklist

Add type annotations for `AtRuleBlockList`

Author: sabberworm

src/CSSList/AtRuleBlockList.php

@@ -6,7 +6,7 @@
 use Sabberworm\CSS\Property\AtRule;
 
 /**
- * A BlockList constructed by an unknown at-rule. @media rules are rendered into AtRuleBlockList objects.
+ * A `BlockList` constructed by an unknown at-rule. `@media` rules are rendered into `AtRuleBlockList` objects.
  */
 class AtRuleBlockList extends CSSBlockList implements AtRule
 {
@@ -48,6 +48,9 @@ public function atRuleArgs()
         return $this->sArgs;
     }
 
+    /**
+     * @return string
+     */
     public function __toString()
     {
         return $this->render(new OutputFormat());
@@ -70,6 +73,9 @@ public function render(OutputFormat $oOutputFormat)
         return $sResult;
     }
 
+    /**
+     * @return bool
+     */
     public function isRootList()
     {
         return false;