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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 list_contents(self):
 """List the contents of this directory :return: A LsInfo object that contains directories and files :rtype: :class:`~.LsInfo` or :class:`~.ErrorInfo` Here is an example usage:: # let dirinfo be a DirectoryInfo object ldata = dirinfo.list_contents() if isinstance(ldata, ErrorInfo):
 # Do some error handling logger.warn("Error listing file info: (%s) %s", ldata.errno, ldata.message) # It's of type LsInfo else: # Look at all the files for finfo in ldata.files: logger.info("Found file %s of size %s", finfo.path, finfo.size) # Look at all the directories for dinfo in ldata.directories: logger.info("Found directory %s of last modified %s", dinfo.path, dinfo.last_modified) """

        target = DeviceTarget(self.device_id)
        return self._fssapi.list_files(target, self.path)[self.device_id]