📦 Better typing for priority queue extractions

Author: andrew-demb

src/Context/Extractor/ContextExtractorChain.php

@@ -25,7 +25,10 @@ public function extract(): ?SpanContext
     {
         $queue = clone $this->queue;
         while (false === $queue->isEmpty()) {
-            if (null !== ($context = $queue->extract()->extract())) {
+            /** @var ContextExtractorInterface $extractor */
+            $extractor = $queue->extract();
+            $context = $extractor->extract();
+            if (null !== $context) {
                 return $context;
             }
         }

src/Debug/Extractor/DebugExtractorChain.php

@@ -23,7 +23,10 @@ public function getDebug(): string
     {
         $queue = clone $this->queue;
         while (false === $queue->isEmpty()) {
-            if ('' !== ($debugId = $queue->extract()->getDebug())) {
+            /** @var DebugExtractorInterface $extractor */
+            $extractor = $queue->extract();
+            $debugId = $extractor->getDebug();
+            if ('' !== $debugId) {
                 return $debugId;
             }
         }