def METHOD_NAME(self):
    c1 = Coordinates([[0, 1], [0, 1]], dims=["lat", "lon"])
    c2 = Coordinates([[10, 11], [10, 11]], dims=["lat", "lon"])
    g = GroupCoordinates([c1, c2])
    d = g.definition
    json.dumps(d, cls=podpac.core.utils.JSONEncoder)
    g2 = GroupCoordinates.from_definition(d)