<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def _pick_exit(self, block_address, stmt_idx, target_ips):
 """ Include an exit in the final slice. :param block_address: Address of the basic block. :param stmt_idx: ID of the exit statement. :param target_ips: The target address of this exit statement. """


        # TODO: Support context-sensitivity

        tpl = (stmt_idx, target_ips)
        if tpl not in self.chosen_exits[block_address]:
            self.chosen_exits[block_address].append(tpl)