code: private function findReturnAnnotations(Tokens $tokens, $index)
      {
          do {
              $index = $tokens->getPrevNonWhitespace($index);
          } while ($tokens[$index]->isGivenKind([
              T_ABSTRACT,
              T_FINAL,
              T_PRIVATE,
              T_PROTECTED,
              T_PUBLIC,
              T_STATIC,
          ]));
  
          if (!$tokens[$index]->isGivenKind(T_DOC_COMMENT)) {
              return [];
          }
  
          $doc = new DocBlock($tokens[$index]->getContent());
  
          return $doc->getAnnotationsOfType('return');
      }
docs: Find all the return annotations in the function's PHPDoc comment.
  
  @param Tokens $tokens
  @param int    $index  The index of the function token
  
  @return Annotation[]