Returns:
            If download over TUF and in-toto is successful, this function will
            return the complete filepath to the desired target.

def download(self, target_relpath, download_in_toto_metadata=True):
        '''
        Returns:
            If download over TUF and in-toto is successful, this function will
            return the complete filepath to the desired target.
        '''
        return self.__get_target(target_relpath, download_in_toto_metadata=download_in_toto_metadata)