<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def send_string(self, string: str):
 """ Sends the given string for output. """

        if not string:
            return

        string = string.replace('\n', "<enter>")
        string = string.replace('\t', "<tab>")
        
        _logger.debug("Send via event interface")
        self.__clearModifiers()
        modifiers = []
        for section in KEY_SPLIT_RE.split(string):
            if len(section) > 0:
                if Key.is_key(section[:-1]) and section[-1] == '+' and section[:-1] in MODIFIERS:
                    # Section is a modifier application (modifier followed by '+')
                    modifiers.append(section[:-1])
                    
                else:
                    if len(modifiers) > 0:
                        # Modifiers ready for application - send modified key
                        if Key.is_key(section):
                            self.interface.send_modified_key(section, modifiers)
                            modifiers = []
                        else:
                            self.interface.send_modified_key(section[0], modifiers)
                            if len(section) > 1:
                                self.interface.send_string(section[1:])
                            modifiers = []
                    else:
                        # Normal string/key operation
                        if Key.is_key(section):
                            self.interface.send_key(section)
                        else:
                            self.interface.send_string(section)
                            
        self.__reapplyModifiers()