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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def _convert(self, desired_type: Type[T], source_obj: S, logger: Logger, options: Dict[str, Dict[str, Any]]) -> T: """ Implementing classes should implement this method to perform the conversion itself :param desired_type: the destination type of the conversion :param source_obj: the source object that should be converter :param logger: a logger to use if any is available, or None :param options: additional options map. Implementing classes may use 'self.get_applicable_options()' to get the options that are of interest for this converter. :return: """

        pass