'Initialize the InstalledAddOnExtensionInstance
:returns: twilio.rest.preview.marketplace.installed_add_on.installed_add_on_extension.InstalledAddOnExtensionInstance
:rtype: twilio.rest.preview.marketplace.installed_add_on.installed_add_on_extension.InstalledAddOnExtensionInstance'

def __init__(self, version, payload, installed_add_on_sid, sid=None):

    super(InstalledAddOnExtensionInstance, self).__init__(version)
    self._properties = {'sid': payload['sid'], 'installed_add_on_sid': payload['installed_add_on_sid'], 'friendly_name': payload['friendly_name'], 'product_name': payload['product_name'], 'unique_name': payload['unique_name'], 'enabled': payload['enabled'], 'url': payload['url']}
    self._context = None
    self._solution = {'installed_add_on_sid': installed_add_on_sid, 'sid': (sid or self._properties['sid'])}
