<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def rename_client_tab(self, client, given_name):

 """Rename client's tab"""

        index = self.get_client_index_from_id(id(client))

        if given_name is not None:
            client.given_name = given_name
        self.tabwidget.setTabText(index, client.get_name())