'Convert to a standard L{dns.Message}.
If C{ednsVersion} is not None, an L{_OPTHeader} instance containing all
the I{EDNS} specific attributes and options will be appended to the list
of C{additional} records.
@return: A L{dns.Message}
@rtype: L{dns.Message}'

def _toMessage(self):

    m = self._messageFactory(id=self.id, answer=self.answer, opCode=self.opCode, auth=self.auth, trunc=self.trunc, recDes=self.recDes, recAv=self.recAv, rCode=(self.rCode & 15), authenticData=self.authenticData, checkingDisabled=self.checkingDisabled)
    m.queries = self.queries[:]
    m.answers = self.answers[:]
    m.authority = self.authority[:]
    m.additional = self.additional[:]
    if (self.ednsVersion is not None):
        o = _OPTHeader(version=self.ednsVersion, dnssecOK=self.dnssecOK, udpPayloadSize=self.maxSize, extendedRCODE=(self.rCode >> 4))
        m.additional.append(o)
    return m
