code: public function getTokenOfKindSibling($index, $direction, array $tokens = [], $caseSensitive = true)
      {
          if (!self::isLegacyMode()) {
              $tokens = array_filter($tokens, function ($token) {
                  return $this->isTokenKindFound($this->extractTokenKind($token));
              });
          }
  
          if (!\count($tokens)) {
              return null;
          }
  
          while (true) {
              $index += $direction;
  
              if (!$this->offsetExists($index)) {
                  return null;
              }
  
              $token = $this[$index];
  
              if ($token->equalsAny($tokens, $caseSensitive)) {
                  return $index;
              }
          }
      }
docs: Get index for closest sibling token of given kind.
  
  @param int   $index         token index
  @param int   $direction     direction for looking, +1 or -1
  @param array $tokens        possible tokens
  @param bool  $caseSensitive perform a case sensitive comparison
  
  @return null|int