'Initialize the Preview Domain
:returns: Domain for Preview
:rtype: twilio.rest.preview.Preview'

def __init__(self, twilio):

    super(Preview, self).__init__(twilio)
    self.base_url = 'https://preview.twilio.com'
    self._sync = None
    self._wireless = None
    self._marketplace = None
    self._bulk_exports = None
    self._proxy = None
    self._hosted_numbers = None
