code: def parse_string(cls, content, basedir=None, resolve=True, unresolved_value=DEFAULT_SUBSTITUTION):
          
          return ConfigParser().parse(content, basedir, resolve, unresolved_value)
docs: Parse URL
  
          :param content: content to parse
          :type content: basestring
          :param resolve: If true, resolve substitutions
          :param resolve: if true, resolve substitutions
          :type resolve: boolean
          :param unresolved_value: assigned value value to unresolved substitution.
          If overriden with a default value, it will replace all unresolved value to the default value.
          If it is set to to pyhocon.STR_SUBSTITUTION then it will replace the value by its substitution expression (e.g., ${x})
          :type unresolved_value: boolean
          :return: Config object
          :type return: Config