@property<EOL><INDENT>def preview(self):<DEDENT>
if self._preview is None:<EOL><INDENT>from twilio.rest.preview import Preview<EOL>self._preview = Preview(self)<EOL><DEDENT>return self._preview<EOL>
Access the Preview Twilio Domain

:returns: Preview Twilio Domain
:rtype: twilio.rest.preview.Preview