original_string: public function serializeToString() {
      $uninitialized = $this->checkInitialized();
      if ($uninitialized !== null) {
        throw new ProtocolBufferEncodeError(
          "Not initialized: " . $uninitialized);
      }
      return $this->serializePartialToString();
    }
code: public function serializeToString() {
      $uninitialized = $this->checkInitialized();
      if ($uninitialized !== null) {
        throw new ProtocolBufferEncodeError(
          "Not initialized: " . $uninitialized);
      }
      return $this->serializePartialToString();
    }
code_tokens: public function serializeToString ( ) { $ uninitialized = $ this -> checkInitialized ( ) ; if ( $ uninitialized !== null ) { throw new ProtocolBufferEncodeError ( "Not initialized: " . $ uninitialized ) ; } return $ this -> serializePartialToString ( ) ; }
docstring: Serializes the message and return it as a string.
  
  @throws ProtocolBufferEncodeError If the protocol buffer is not
  initialized.
  
  @return string The serialized protocol buffer.
docstring_tokens: Serializes the message and return it as a string .