code: public function getMeaningfulTokenSibling($index, $direction)
      {
          return $this->getTokenNotOfKindSibling(
              $index,
              $direction,
              [[T_WHITESPACE], [T_COMMENT], [T_DOC_COMMENT]]
          );
      }
docs: Get index for closest sibling token that is not a whitespace or comment.
  
  @param int $index     token index
  @param int $direction direction for looking, +1 or -1
  
  @return null|int