code: def parameters(cls, sort=True, as_strings=False):
          
          def cft(ftype, fdefault):
              """ Convert field type and default value to string """
              if ftype is None:
                  return u""
              if ftype in [TimeValue, Decimal, float]:
                  cftype = u"float"
                  cfdefault = u"%.3f" % ftype(fdefault) if fdefault is not None else u"None"
              elif ftype == int:
                  cftype = u"int"
                  cfdefault = u"%d" % ftype(fdefault) if fdefault is not None else u"None"
              elif ftype == bool:
                  cftype = u"bool"
                  cfdefault = u"%s" % fdefault if fdefault is not None else u"None"
              else:
                  cftype = u"unknown"
                  cfdefault = u"%s" % fdefault if fdefault is not None else u"None"
              return u" (%s, %s)" % (cftype, cfdefault)
  
          parameters = [(field, fdesc, ftype, fdefault) for (field, (fdefault, ftype, faliases, fdesc)) in cls.FIELDS]
          if sort:
              parameters = sorted(parameters)
          if as_strings:
              l = max([len(t[0]) for t in parameters])
              parameters = [u"%s : %s%s" % (f.ljust(l), d, cft(t, df)) for (f, d, t, df) in parameters]
          return parameters
docs: Return a list of tuples ``(field, description, type, default)``,
          one for each field of the configuration.
  
          :param bool sort: if ``True``, return the list sorted by field
          :param bool as_strings: if ``True``, return formatted strings instead
          :rtype: list