def __init__(self, version, payload, service_sid, list_sid, index=None):
super(SyncListItemInstance, self).__init__(version)<EOL>self._properties = {<EOL>'<STR_LIT:index>': deserialize.integer(payload['<STR_LIT:index>']),<EOL>'<STR_LIT>': payload['<STR_LIT>'],<EOL>'<STR_LIT>': payload['<STR_LIT>'],<EOL>'<STR_LIT>': payload['<STR_LIT>'],<EOL>'<STR_LIT:url>': payload['<STR_LIT:url>'],<EOL>'<STR_LIT>': payload['<STR_LIT>'],<EOL>'<STR_LIT:data>': payload['<STR_LIT:data>'],<EOL>'<STR_LIT>': deserialize.iso8601_datetime(payload['<STR_LIT>']),<EOL>'<STR_LIT>': deserialize.iso8601_datetime(payload['<STR_LIT>']),<EOL>'<STR_LIT>': payload['<STR_LIT>'],<EOL>}<EOL>self._context = None<EOL>self._solution = {<EOL>'<STR_LIT>': service_sid,<EOL>'<STR_LIT>': list_sid,<EOL>'<STR_LIT:index>': index or self._properties['<STR_LIT:index>'],<EOL>}<EOL>
Initialize the SyncListItemInstance

:returns: twilio.rest.preview.sync.service.sync_list.sync_list_item.SyncListItemInstance
:rtype: twilio.rest.preview.sync.service.sync_list.sync_list_item.SyncListItemInstance