original_string: public static function check(): bool
    {
  	  return
        isset(self::$user, self::$table, self::$db) &&
        self::is_init() &&
        self::_get_db();
    }
code: public static function check(): bool
    {
  	  return
        isset(self::$user, self::$table, self::$db) &&
        self::is_init() &&
        self::_get_db();
    }
code_tokens: public static function check ( ) : bool { return isset ( self :: $ user , self :: $ table , self :: $ db ) && self :: is_init ( ) && self :: _get_db ( ) ; }
docstring: Checks if all history parameters are set in order to read and write into history
  @return bool
docstring_tokens: Checks if all history parameters are set in order to read and write into history