<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def get_sanitizer_for(self, table_name, column_name):
 """ Get sanitizer for given table and column name. :param table_name: Name of the database table. :type table_name: str :param column_name: Name of the database column. :type column_name: str :return: Sanitizer function or None if nothing is configured :rtype: Optional[Callable[[Optional[str]], Optional[str]]] """

        sanitizer_key = "%s.%s" % (table_name, column_name)
        return self.sanitizers.get(sanitizer_key)