'Generate an instance context for the instance, the context is capable of
performing various actions.  All instance actions are proxied to the context
:returns: CredentialListContext for this CredentialListInstance
:rtype: twilio.rest.trunking.v1.trunk.credential_list.CredentialListContext'

@property
def _proxy(self):

    if (self._context is None):
        self._context = CredentialListContext(self._version, trunk_sid=self._solution['trunk_sid'], sid=self._solution['sid'])
    return self._context
