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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def loadMibs(self, *modNames):
 """Schedules search and load of given MIB modules. Parameters *modNames: one or more MIB module names to load up and use for MIB variables resolution purposes. Returns ------- : :py:class:`~pysnmp.smi.rfc1902.ObjectIdentity` reference to itself Examples -------- ObjectIdentity('SNMPv2-MIB', 'sysDescr') """

        if self._modNamesToLoad is None:
            self._modNamesToLoad = modNames

        else:
            self._modNamesToLoad += modNames

        return self