Update src/ClassesInDirectories.php

Co-authored-by: coderabbitai[bot] <136622811+coderabbitai[bot]@users.noreply.github.com>

src/ClassesInDirectories.php

@@ -91,23 +91,18 @@ private static function getClassFromFile(string $filePath): string|null
     /** @param array<int, mixed> $tokens*/
     private static function extractNamespace(array $tokens): string|null
     {
-        /** @psalm-suppress MixedAssignment */
-        foreach ($tokens as $index => $token) {
-            if (is_array($token) && $token[0] !== T_NAMESPACE) {
-                continue;
-            }
-
-            for ($j = $index + 1, $count = count($tokens); $j < $count; $j++) {
-                assert(is_array($tokens[$j]) && isset($tokens[$j][0]));
-                if ($tokens[$j][0] === T_NAME_QUALIFIED) {
-                    $string = $tokens[$j][1];
-                    assert(is_string($string));
-
-                    return $string;
-                }
+        $index = array_search(T_NAMESPACE, array_column($tokens, 0));
+        if ($index === false) {
+            return null;
+        }
+
+        $remaining = array_slice($tokens, $index + 1);
+        foreach ($remaining as $token) {
+            if (is_array($token) && $token[0] === T_NAME_QUALIFIED) {
+                return $token[1];
             }
         }
-
+        
         return null;
     }