Saving stored files at a given path (relative paths are added).

        Args:
            path (str): root path where to save the files.

def save(self, path):
        """
        Saving stored files at a given path (relative paths are added).

        Args:
            path (str): root path where to save the files.
        """
        for relative_path_and_filename, content in self.files.items():
            full_path_and_filename = os.path.join(path, relative_path_and_filename)
            full_path = os.path.dirname(full_path_and_filename)

            if not os.path.isdir(full_path):
                os.makedirs(full_path)

            with open(full_path_and_filename, 'wb') as handle:
                handle.write(b64decode(content))