original_string: public function withTag($tag): Identifier
      {
          $obj = clone $this;
          $obj->_tag = new BigInt($tag);
          return $obj;
      }
code: public function withTag($tag): Identifier
      {
          $obj = clone $this;
          $obj->_tag = new BigInt($tag);
          return $obj;
      }
code_tokens: public function withTag ( $ tag ) : Identifier { $ obj = clone $ this ; $ obj -> _tag = new BigInt ( $ tag ) ; return $ obj ; }
docstring: Get self with given type tag.
  
  @param int|string $tag Tag number
  @return self
docstring_tokens: Get self with given type tag .