code: def write(self, path):
          
          with open(path, 'w') as fd:
              fd.write(json.dumps(
                  {
                      "created_at": self._created_at,
                      "version": self._version,
                      "mtllibs": self._mtllibs,
                      "vertex_buffers": self._vertex_buffers,
                  },
                  indent=2,
              ))
docs: Save the metadata as json