@property<EOL><INDENT>def extensions(self):<DEDENT>
if self._extensions is None:<EOL><INDENT>self._extensions = AvailableAddOnExtensionList(<EOL>self._version,<EOL>available_add_on_sid=self._solution['<STR_LIT>'],<EOL>)<EOL><DEDENT>return self._extensions<EOL>
Access the extensions

:returns: twilio.rest.preview.marketplace.available_add_on.available_add_on_extension.AvailableAddOnExtensionList
:rtype: twilio.rest.preview.marketplace.available_add_on.available_add_on_extension.AvailableAddOnExtensionList